hiking sites

About a year ago a coleague at Uniway told me about geocaching.
Geocaching is a game, where you have to find hidden objects (caches) based on GPS coordinates and hints.
A great way to have an entertaining and beautiful walk in an area you don't know.
With our friends we did a cache related to the flooding of the Yzer estuary in World War I.

This weekend I stumbled upon routeyou, another nice walking site. They have got plenty of descriptions of hikes and bike trips. Here's an example walk.