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

TripAdvisor - Unbiased hotel reviews, photos and travel advice for hotels and vacations - Compare prices with just one click.

Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the worl...

Backpacker Magazine is your source for gear reviews, outdoor skills information and advice, and destinations for backpacking, camping, hiking, and oth...

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

Rolwaling, the sacred valley: culture, geography, photos, maps, how to get there, academic and recreational programs

The Sierra Club is America

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.