OHM2013 - a 5 day hacker/maker camp in The Netherlands
ohm2013.org
ohm2013.org
They are all held in The Netherlands - with four years in between each event. They usually get a three letter abbreviation (GHP, HEU, HIP, HAL, WTH, HAR).
There is a related event held in Germany, also every fourth year - but amusingly two years apart from the event in The Netherlands by the Chaos Computing Club.
If you're an North American and this seems interesting - I'd recommend that you check with "Hackers on a Plane" and see if they'll arrange a trip - like they've done previously from The States over to Europe.
It would also be good to point out that they owe a ton to Rop Gonggrijp, co-founder of the dutch ISP xs4all (one of the first ISPs in the world) and his publication hack-tic.
I can say it's like UEFA European Championship and FIFA World Cup for Football (Soccer) :D
http://veenendaal.startupweekend.org/
Not trying to hijack -- it's just great to see these events where I live.
I'm in Ede by the way, hi!
250 - Overpriced ticket
180 - Normal ticket
125 - Budget ticket
from which you can choose your own price.
Seriously considering going (with a normal ticket :)).
http://www.youtube.com/watch?v=qsaSfUwOVkw
I suspect we'll build some hexayurts too.
https://ohm2013.org/wiki/Camping:Travel follow the sings towards "Recratiegebied Geestmerambacht". sings
Hope the 'Hackers On A Bike' effort gets some more traction again too.
https://ohm2013.org/wiki/User:Rootman/HackersOnABike
Being a wiki, these pages should probably be merged.