Garmin Etrex Legend
Geocaching is a fun sport and you get healthy while you are doing it. I do it for about 2 years now and already did have lots of fun. there are also member meetings. and Hunt events all trough the world.
You can also do some route navigation in the woods of Staatsbosbeheer. You can find info on Staatsbosbeheer on their website. It is only in dutch. www.staatsbosbeheer.nl there are also routes on www.wandelpad.nl
you can find more info on GPS at Garmin for url look above.