HEATKEYS

Helps groups of people with shared interests plan meetings and form offline clubs in local communities around the world

YouTube is a place to discover, watch, upload and share videos.

Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.

RootsWeb - the Internet

Visit Massachusetts (MA) is the best online travel, tourism and vacation guide for Massachusetts. Extensive tourist information for Mass vacations, attractions, events, activities, hotels, places to visit and things to do. A Visit New England site.

Plan bicycle rides, bike routes and analyze performance data using google maps. See elevation profiles while you map then share with your friends. Upload your GPS data (TCX, GPX and KML) for advanced ride analysis including interactive graphs of po...

The National Speleological Society is a not for profit organization dedicated to the study, conservation, exploration and knowledge of caves.