geocaching

Resources:

Geocaching.com
Includes large database on caches to hunt down, along with general information on geocaching.
http://www.geocaching.com/

Navicache
Provides a wide range of information and listing resources for the geocaching enthusiast including worldwide cache listing service, forums, and chat.
http://www.navicache.com/

Geocaching Fun
Offers alternative geocaching uses including cache travel, which takes you on a cache tour of popular tourist attractions.
http://www.geocaching-fun.com/

Geocaching Australia
Australian geocaching portal complete with links to forums, mapping tools and personal cache pages.
http://geocaching.com.au