123WorldTour.com
This tour operator specializes in adventure and trekking tours to India.
http://www.123worldtour.com/

Active Scotland
Search for an activity holiday in Scotland that interests you.
http://www.active-scotland.co.uk/en/frameset.htm

Activity Holidays Guide
Searchable database of special interest and activity holidays worldwide.
http://www.activityholidaysguide.com/

Adventure Sports Online
Features tips on buying gear and general fitness, an index of outdoor touring companies, products and services, and a host of other resources.
http://www.adventuresports.com/

African Adrenalin
Links to firms offering safaris and other options for adventure travel in Africa.
http://www.africanadrenalin.com

America Outdoors
Search for adventure travel activities ranging from cycling to winter sports by state.
http://www.americaoutdoors.org/

Away.com
An adventure travel guide that offers inspiration and acts as a guide to activities and destinations for the intrepid traveller.
http://away.com/index.adp

Backpacker.com
Online version of a popular magazine aimed at outdoor types.
http://www.backpacker.com/

Blue Magazine
Offers reviews of adventure travel tours in categories ranging from cycling to trekking. Just click on the link marked "trip" to reach the relevant page.
http://www.bluemagazine.com/

British Activity Holiday Association
Search for British activity holidays in the following categories: adults, children, families, groups, schools and management training.
http://www.baha.org.uk/

ChilliSauce.co.uk
A UK site offering adventure travel activities in the following categories: high altitude, great explorations, high octane and wild water.
http://www.chillisauce.co.uk/travel/index.php

Eco Travel
Online ecotourism directory and magazine.
http://www.ecotravel.com/

European Cultural and Activity Tours
A directory of cultural and activity tours in Europe: walking, cycling, tennis, sailing, riding, painting, architecture, belly dancing, wine, cookery, etc.
http://www.europe-culture-activity-tours.com/

Explore Blogs
Blogs and podcasts from the staff of Explore, an adventure travel agency, that lift the lid on adventure holidays worldwide.
http://www.exploreblogs.co.uk/

Factivities
Comprehensive directory of outdoor adventure activites in the UK ranging from caving to wing walking.
http://www.factivities.co.uk/

Family Adventure Magazine
The magazine is an information resource on family adventure travel, as well as a listing of companies that offer family adventure travel throughout the world. The magazine comes out twice a year to keep it current. Subscriptions are available for US$8 and CAN$10.50.
http://www.familyadventuretravel.com/

Fielding's DangerFinder
Adventure travel links.
http://www.comebackalive.com/df/advcalls.htm

Find My Adventure.com
Directory of adventure travel operators ranging from auto racing schools to windsurfing instructors.
http://www.findmyadventure.com/

Forbes.com
Summer camps for grown ups.
http://www.forbes.com/2002/06/06/0606feat.html

Go Nomad.com
International adventure travel search engine.
http://www.gonomad.com/

Go Play Outdoors
North American web guide to adventure and outdoor activities.
http://www.goplayoutdoors.com/

Golden Gap Years
Inspiration on adventure travel and holiday ideas for the over forties.
http://www.goldengapyears.com/

goneAWOL.com
An international directory of adventure travel with over 6,000 links.
http://www.goneawol.com/

Gordon's Guide
Worldwide index of adventure and active travel operators.
http://www.gordonsguide.com/

Gorp.com
The ultimate trip planner and resource directory for the adventure traveller.
http://www.gorp.com/

Great Outdoors.com
News, gear and inspiration for hiking, climbing, skiing, paddling, cycling, running, photography and adventure travel.
http://www.greatoutdoors.com/

Grown Up Camps.com
Lists fantasy camps, recreational adventures, sports programs, learning vacations and more for the adult traveler.
http://www.grownupcamps.com/

Ifyouexplore.com
Impressive travel portal for the adventure seeker, where you can book a holiday or simply explore the links and information pages to plan your own trip.
http://www.ifyouexplore.com/

InfoHub.com
This really is one of the best sites on the Web to search for an adventure holiday of any description, be it a jungle expedition, spiritual tour, extreme sports, or volcano tour.
http://www.infohub.com/

Learningholidays.com
A searchable database of learning and adventure holidays worldwide.
http://www.learningholidays.com/index.html

Lonely Planet _ Experimental Travel
Find out more about the latest tourism craze, experimental travel, in which you dump your guide book in favour of exploring the world ina a wacky, impulsive and totally surreal way.
http://www.lonelyplanet.com/experimentaltravel/

Mountain Zone.com
Online resource covering snow boarding, mountain biking, hiking, skiing, climbing, photography, etc.
http://www.mountainzone.com

Outdoor Guides
Over 4,000 outdoor guides listed worldwide.
http://www.outdoorguides.com/

Outdoorzy.com
Web resource, planning tool and social networking site aimed squarely at outdoors types.
http://www.outdoorzy.com/

Outside
The online version of this American adventure travel magazine is packed full of interesting and informative articles on the subject.
http://outside.away.com/index.html

Outside.nz.com
An online listing of New Zealand's 300 best tour operators and destinations for adventure travel.
http://outside.nz.com/

Planet Charters
Search for adventure activities or outdoor adventures, such as scuba diving or hot air ballooning, in your neck of the woods.
http://www.planetcharters.com/

Rando
French outdoors and activity guide.
http://www.rando.net/eng/

Real Adventures.com
Travel planning guide with a light emphasis on adventure travel.
http://www.realadventures.com/

Recreation.com
Search for recreational activities, ranging from auto touring to winter sports, all over America.
http://www.recreation.gov/

SeriousSports.com
A comprehensive guide to the best outdoor outfitters, schools, guides and travel in the United States and worldwide; the site covers everything from hand gliding to horse riding.
http://www.serioussports.com/

Speciality Travel Index
Lists over 500 tour operators worldwide offering thousands of adventures.
http://www.specialtytravel.com/

The Karakoram Highway and Beyond...
A practical travel planner for anyone interested in travelling the ancient Silk Route.
http://home.hkstar.com/~roz/Index.htm

The Travellers Lounge
Internet planning resource for anyone who wants help organizing a round-the-world trip.
http://www.thetravellerslounge.co.uk/

This The Life.com
Share your favourite experiences including adrenaline thrills and extreme sports online or read examples posted by others.
http://www.thisisthelife.com/

Time Outdoors.com
A British site offering expert advice to the nation's outdoor enthusiasts.
http://www.timeoutdoors.com/

Trails.com
A subscription service that highlights mountain biking, road biking, hiking and birding trails, as well as scenic drives and fishing spots nationwide.
http://www.trails.com/

Trailsource
Pay your subscription and view skiing, hiking, biking, horse riding and sledding trails worldwide.
http://www.trailsource.com/

Travel Quest
Worldwide directory of special interest, activity and adventure holidays and tours.
http://www.travel-quest.co.uk/

UberVenture
Contribute your most embarrassing or funny adventure travel story to this website and, if it makes it into the book they're compiling, they'll give you a cut of the profits.
http://www.uberventure.co.uk/

UK Travel Pages
Special interest opportunities in the UK listed by category, be it ski holidays, safaris or disabled travel.
http://www.uktravelpages.com/

Unmissable.com
Use this site to research, find and tailor activities, events, holidays and destinations.
http://www.unmissable.com/

WhatToDo.co.za
Search for recreational activities, sports and adventure in South Africa by province or region.
http://www.whattodo.co.za/

Where Will We Go
Adventure and cultural travel guide. Search by country or activity, gap year travel or fund raising travel.
http://www.wherewillwego.com/

Wild Dog Adventure
Are you sure you want an adventure holiday, but not sure where or doing what? You can search for the perfect trip using this British search engine, which finds travel agents and tour operators matching your requirements.
http://www.wild-dog.com/

WildSeeker.com
Features a handy interactive directory of adventure travel operators all over the globe.
http://www.wildseeker.com/

Wildthings.com
Index of adventure travel activities all over the globe.
http://www.wildthings.com/

World Surface.com
Search for a trip by country and activity.
http://www.worldsurface.com/