Morning Meeting at The Fish Market, Phan Thiet, Vietnam
Photo: Lucas Jans, through a Creative Commons Attribution License

We don't all have vacation time to burn. Each one of the adventure tours listed below is an absolute classic. That means that they're both popular and amazing experiences.

You can't go wrong with any one of these adventure tours. Each one of these adventure tours is an undisputed classic. There's no doubt you'll have an amazing experience doing any one of these adventure tours.

Antarctic Small Boat Adventure Tour: A small boat cruise from Ushuia to the Antarctic Peninsula is an amazing 3 week adventure tour journey to a virtually untouched world of snow, ice, and of course penguins is a life changing experience.

Trekking to Machu Picchu: This four-day trek through the mountains of Peru to the mythical ruins of Machu Picchu is is just part of a complete 10 day adventure tour of Peru.

Grand Canyon River Trip: The ten-day river trip down the Colorado River through the Grand Canyon is easily the best whitewater river trip in the world.

Annapurna Circuit: The 20-day trek around Nepal's Annapurna Massif over the 17,771 foot Thorong La Pass and down the Kali Gandaki Valley, the deepest valley in the world is rapidly changing with new road building - see it before it's gone.

Hanoi to Bangkok Adventure Tour: A 10-day adventure tour down the coast of Vietnam from Hanoi and the magnificent Ha Long Bay to Saigon and then across Cambodia to Thailand with the sobering Phnom Penh and the stunning temples of Angkor Wat.

Galapagos Islands Adventure Tour: A visit to the Galapagos, with its tremendous diversity of plant and animal life provides an outstanding week long adventure.

Everest Trek to Base Camp: The trek to Everest's Base Camp in Nepal goes through the world's most stunning alpine scenery among the wonderful Sherpa people.

Trekking Kilimanjaro: The climb to the summit of Kilimanjaro through dozens of eco-systems from Jungle to alpine glaciers is the adventure tour of a lifetime.

Milford Track - New Zealand Adventure Tour: An adventure tour to New Zealand with it's beautiful coastal and mountain scenery and a trek along the Milford track is a classic.

Serengeti: An adventure safari tour to the Serengeti in Tanzania, where travelers can see lions, elephants, giraffes, and zebras in the wild on the African savannah, is one of the classic adventure tours on the planet.