Picture of The Evil Cache
My girlfriend and I have recently started geocaching and we both really enjoy it.  We've seen/been to some neat places that we otherwise would have just passed on the road or would have never visited unless we were hunting one of these things down.
We have also been stumped by more than a few of the more difficult ones known as "nano" caches.  these things are nothing but a tiny canister with a magnet and only enough space inside to hold a rolled up piece of paper to log your visit, and people get really clever when they hide them.  So I decided to try my hand at making one of these evil little things.....only more evil!

Step 1: Materials

Picture of Materials
This is a pretty cheap project to make, all you need are some hardware bits you may have lying about and some simple tools.  the most expensive material needed was the nano cache itself, cost about $10 at my local R.E.I.


-A bench vise
-A pneumatic cutoff wheel (and air compressor of course, or a hacksaw)
-Some J.B. Weld
-A 1/2" diameter by 2 1/2" hex bolt ( I chose 2 1/2" to give me some material to play with)
-A 1/2" Nut that fits on the bolt
-Two 5/16" internal diameter washers (these are the exact diameter of the nano cache)
-One 1/2" internal diameter washer (This will fit around the hex bolt)
-A small rare earth magnet (I scavenged this off one of my girlfriend's old name badges from her job)
-A metal file
-Toothpicks & something to mix the J.B. weld in

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Jon B35 years ago
I hate "evil caches"!

But to help find them I always keep a "day-glo" vest and a clipboard in the cache-mobile. Put on the vest and despite glowing like an radioactive orange you can look over a structure for hours and no-one even notices you. You just look like a municipal or council worker. (And 'cause you're not actually claiming to be one no-one can hassle you for impersonating one)

Jot a couple of "notes" on the clipboard ever now and then, consult the GPS and you're set!
WPee Jon B35 years ago

REMEMBER don't walk TOO FAST or everyone will know you are NOT a government employee...
("worker" does not apply here ...use employee when talking about government types)

I think the proper term is "placeholder" or "skinwaster"

qualia WPee3 years ago
i have alot of animosity towards my memories of the year i spent as a council employee. you wouldnt be that enthusiastic about working either if your job was picking up litter (mostly fast food wrappers and illegally dumped household garbage on a daily basis, garbage that you had to tear open and search through in case there were old letters indicating the identity of the culprit so they could be prosercuted.)

am seriously considering making one of these geocaches. i have a cnc mill and lathe.

and i still have the council worker uniform.

and plumbing overalls.

this could work.

could make heaps of these so they outnumber the actual load bearing bolts on a bridge and install them so overenthusiastic geocachers cause a serious disaster.

Pat_Maroney (author)  Jon B35 years ago
I like that idea, very clever.
Where does one get a day glo vest?
Around here most shops like KMart have them. But specialty work-wear and safety equipment shops should have them if your local big chain shops don't.

The basic ones only cost US$5 here because classed as safety gear and just about everyone who does a manual type job is required to wear one. Gardeners, mail-people, delivery people, cyclists, builders etc etc.
KJ4ZVQ Jon B34 years ago
if you have a local Tractor Supply Co., they will have them.
fantastic anti muggle disguise.   never would have thought of it 
Pat_Maroney (author) 4 years ago
Ok, Finally got around to placing this thing.
The Cache's name is "Asymmetrical"
coordinates are: N38 39.953 W121 31.212
Placed in Natomas CA
Happy hunting :)
I got on Google maps and did a 360 spin to look around. "This isn't to bad" I thought "A wall, some bushes, not much that can hold a screw" I thought.
Then I saw a metal sculpture,
Then a bridge,
Then a bunch of electrical boxes, a pipe coming out of the ground, a road sign, and a light pole.

If I'm ever in that part of California I'll try my luck!
the-police3 years ago
You should put it on a grain bin... that would be so evil.... there are 2000+ bolts sticking out on most grain bins... ;)
Make one that looks like a piece of excrement; a bird dropping stuck on a tree or an owl pellet. Something that would take guts to attempt to pick up with a bare hand. One time I cut my hand on the lip of a cache. It was kind of anticlimactic. I was tempted to sign my name in blood but decided against it. I later died of tetanus. JK about the tetanus but the rest is true. That was truly an evil cache. And, it was by a cemetery too. Aroooooo...scary! Nice work on yours.
I think I must've made the entire forest of animals think I lost my marbles once, when I actually found a stage of a multi-cache, when I sat-down, and saw a blob of what looked like animal droppings, until I touched it with a walking pole, and heard a metal (pole) versus stone click. They do make them, usually with a cryo-tube underneath. I've actually found a few of these 'Nut & Bolt' containers here in Connecticut. they're not that hard to make, but I imagine a bear & a half to drill-out the end to hide the cache in. Another alternative, I've seen people put a Neodymium magnet in the nut, sea it in with epoxy, then insert the bolt with the log book into the rest of the nut.
better idea. stick of dynamite with a piece of rolled up paper inside. And have it rigged to explode at a moment notice.
jplate14 years ago
Woah! you violated Rule #1 of Geo-Caching.. DON'T TELL *MUGGLES!!!
( non-geo-cachers )
BigDrig4 years ago
Awesome! its great to know there are other Geocachers here.
Pat_Maroney (author) 4 years ago
Front Page again! Thank you to the powers that be at Instructables Im flattered to be chosen again.

A major snag I've run into with this cache: it seems the JB Weld likes to rust in the outdoor elements and therefore snap off of the top of the internal nano cache, a simple solution is to throw away the top of said nano cache and just screw the cut & filed piece of bolt into the nut.
If you really wanted to be clever and fashion some sort or rubber grommet you could cut a circular section of rubber from a flat bike inner tube and glue it to the bottom of the top bolt piece to protect the log.
Pat_Maroney (author) 4 years ago
thanks for all the sweet comments.
Unfortunately the top half of the cache got lost right after i placed it.
now I have to make a new one from scratch to replace it :P
rhm34 years ago
I've done a few Geocaches and am a memeber of geocaching.com. If I were to come across this cache I would definiately leave it for the experts. LOL !
mash40774 years ago
this structible got me into Geocaching thanks!
I havent tried any nanos yet made or found. We just made our first Geo cache. (its here on instructables) but this is so cool. I'm gonna try my hand at finding some but this will def be the first one i make. so wonderfully Wicked
Gottwinkies4 years ago
LOL! I like your kind of evil! When I first saw this I wasn't thinking geocache...and I find I am still wondering what else I can use this little container of evil for...Mouhahahhhaaaa
abun19914 years ago
I've always wanted to try goecaching, but apparently a gang called "the presidents" steals all the caches around where I live. *sigh*
krapphace5 years ago
axmon5 years ago
you are true evil and sicken me too the core. nah cheers bro il try thaton my friends who are keen on geocashing.
Rainh2o5 years ago
Or you can hollow the bolt out like I did, then you can put the log in a piece of straw inside...

Was it a hardened bolt? I hope not because you could wreck quite a few bits with that! I'm liking the aged look, it would definitely help it blend in
Pat_Maroney (author)  Rainh2o5 years ago
That IS awesome!
thats just wrong.... i love it
Rainh2o Rainh2o5 years ago
Then when you hide it you can thread it through an object with a hole in it.  I have made some more pretty evil ones in my day, if you want to see, contact me and I'll send you pictures of others
Dr.Bill5 years ago
And Why exactly would you want to hide a note so completely?
I did not catch that part.
Pat_Maroney (author)  Dr.Bill5 years ago
because its geocaching
thats kind of the point
peaceamidst5 years ago
...I don't understand what this is. Anyone care to explain?

Geocaching is a high tech scavenger hunt involving GPS. Players of the game will hide a container, ranging from the size of a peanut to the size of a military foot locker. Yes, there is a geocaching container in New Orleans that is a huge trunk with lots of cool stuff in it to trade out.  Anyway, players will hide a cache, and then post the GPS coordinates on www.geocaching.com. Other players will go find the cache. 

Once you get started in caching, you will find that it's addictive.  You get to see parts of the country or your own city that you would have otherwise passed by.  Some of my best friends were made while geocaching.  Best of all, it's family friendly.  In fact, we encourage families to get involved.

It's an environmentally conscious activity where we encourage those participating to clean up the planet as they are out caching. The geocaching website has planned events where all we do is get together and clean up an area or parts of the city. The activities are called C.I.T.O.; Cache In Trash Out. We like to leave areas better than when we arrived.... kinda like the Boy Scouts.

I encourage everyone to get involved in Geocaching. I can't think of a single negative thing to say about it, because it's so much fun.  And who doesn't like to go on a treasure hunt? It takes you back to those times on innocent childhood when you're in your backyard playing Pirate.

Neat. What do you need to get started. Or more like is it expensive?
Really you just need a computer, you obviously have one, access to the internet so you can make a Geocache account, and Google maps, but Google maps makes it harder.  The true way of Geocaching is with a GPS.  They start at about $100 and go up to around $800.  Mine was $650 and is accurate to about 5m.
    Aren't their gps apps for an ipod touch? If so do you think it would work for this, cause I have an ipod touch 2nd gen. Other wise I would go with google maps I guess. How do I start tracking them? Do I use that Geo aching site or something?
They do work for that.  They work not too bad.  I find an actual GPS to be better, it might be my preference though.  And yes, you use the Geocache website.  You go on, make an account and find a cache near you, enter the long. and lat. coordinates into the device (You connect it to computer via USB or something and you can write it directly to the device)  and then follow it to the coordinates.  When you are close, its all about a sharp.
So do you think if I got a gps app could I just search it up and leave it as a stale page? Or does it not use the net?
I've used the iPod Touch with the Geocaching app, and it will allow you to save the pages for offline use.  Which is useful when you're driving down an old farm road and no WiFi anywhere.

It's a very cool app, with lots of capabilities.  Some of which are useless unless you have an iPhone.  But I make do with what I have.  A true Maker will find ways of improving what they have without going out and buying the newest gadget to replace it.  We want to make said gadget.  Which is the reason for this site. ;-)

I'll agree with Wesley666 in that a true GPS unit is the only way to go.  Most smart phones use cell tower triangulation to pinpoint your location.  It's accurate to within 100 to 3500 feet.  Depending on building, terrain, electrical disturbances in the area, weather and much more.  Anyone who uses a smart phone to geocache with success is a very lucky person.  The accuracy is, in a word, crap.

You can find Garmin and Magellan GPS receivers on eBay at affordable prices.  If you get one for say $70.00, you're doing pretty good.  And all the pretty screens and other bells are whistles are not necessary to geocache.

We had a couple of kids in our area that wasn't even using GPS to find geocaches.  They would print out the satellite image from the site, and go to that location and just hunt for the cache.  They found about 25 caches this way.

There's more than one way to do things. Improvise, Overcome, and Adapt.  It's not just words that the Marines utter. Get out there and have some fun. :-)
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