One World Tours - Offers a broad range of holidays and tours to Egypt, Thailand, Jordan, HongKong, and China. Includes tours tailor made to fit client-specific dates, times, and budget.
Oneira Holidays - Offers hotels and self-catering villas, apartments, and studios for holidays on the Greek islands of Kefalonia and Ithaca.
Ooraminna Bush Camp - Experience outback Australia on a working cattle property. Horse riding and sight seeing in the Ooraminna Ranges.
Open Road Tours - Custom designed trips throughout the Southwest U. S. for organizations, families, and individuals. Day tours of the Valley of the Sun, multi-day trips, and adventure travel packages.
Opera Select - Offers opera tours within Europe. In Dutch.
Operation Africa - Specializes in tours to South Africa, Mozambique, Zimbabwe, Botswana, and Namibia.
Operation Wallacea - Not for profit project that takes paying volunteer naturalists, trekkers and divers to help scientists map the wildlife in remote rainforests and survey the coral and fish life of reefs in Indonesia.
Operatur Patagonica - Helping visitors enjoy the natural beauty of the area, especially Torres del Paine National Park.
Orange Torpedo Trips, Inc. - Guided whitewater raft and inflatable kayak trips in Idaho, Oregon, California, and Arizona, on the Salmon, Rogue, Klamath, North Umpqua, and Colorado rivers.
Orange Vacations - Provides tour packages that include a choice of hotel or resort and trips to Walt Disney World, Universal Studios, SeaWorld, and other destinations.
Orca Enterprises - Juneau, Alaska, tour operator Captain Larry offers whale watching, wildlife excursions, and fishing charters.
Oregon's Northside Outfitters - Big game guide and outfitter in eastern Oregon, hunting elk, whitetail and mule deer, cougar, bear, and coyote.
Organ Cave, Inc. - Offers tours of a cave that has over 40 miles of passageways and a Civil War history.
Organic Tuscany - Organic cooking vacations in Tuscany. Includes visits to local organic farms, cooking classes, wine and olive oil tastings, and tours of Florence and Siena.
Orient Tours UAE - Offers city tours, desert safaris, and off-road tours for groups and individuals in the UAE and Oman.
Orinoco Tours Venezuela - Offers river expeditions, trekking, jeep tours, diving, and wildlife viewing.
Out For Adventure Sea Kayaking Vacations - Offers sea kayaking tours and trips from Vancouver Island, British Columbia, Canada. Kayak with killer whales, explore Desolation Sound, and more.
Out of Africa Safaris - Offers tours around much of Southern Africa, including South Africa, Namibia, Lesotho, and Swaziland.
Out of the Blue, N.W. Ltd. - Specializing in the selection and restoration of fine furniture, as well as escorted buying tours of England and France.
Out on the Salty Seas - Sailboat chartering in sunny Greece. All you wanted to know, plus pictures, comments, clickable maps, links.
Outback Adventures - Guide service and rental shop specializing in kayaking, backpacking, and climbing in California.
Outback Tours - Half, full, and multiple day safaris in the American Southwest.
Outback Tours - Backcountry safaris following the early pioneers and gold seekers in the Queenstown Southern Lakes area of New Zealand.
Outback Wilderness Adventure - Offers two to ten day guided dogsled tours in Sweden. Ice fishing and cross country skiing available.
Outdoor Adventure - Offers surfing, windsurfing, and multi-activity holidays at Widemouth Bay.
Outdoor Adventure Holidays - Provides abseiling, hiking, rafting, horse riding, mountain bike riding, and rock climbing adventures in Australia. Package includes all activities, meals, and accommodation.
Outdoor Aventures - Offers whitewater river rafting trips in California, Oregon, and Idaho.
Outdoor Excursions - Offering rafting, tubing and kayaking instruction and adventure travel in the D.C. area.
Outdoor Pursuits UK - Offers paintball, air pistol and clay pigeon shooting, quad biking, bungee jumping, archery, and more.
Outdoor Safaris - Outfitter and guide booking service for hunting, fishing, and whitewater tours, including guest ranch stays, around the world.
Outdoor Travel Adventures (OTA) - Offering outdoor team adventures including climbing, rafting, kayaking, and multi-sport trips worldwide.
OutdoorInAsia - Outdoor adventures, team building, and incentive programs for corporations. Specializes in horse riding, treasure hunts, sailing, and motorbiking in Singapore and Malaysia.
