Where is best for adventure tours in Colombia? There's various subsections on trekking, rafting, mountain biking and other adventure travel activities. Generally speaking, San Gil is known as Colombia's adventure travel capital, and offers a range of adventure tours such as caving, parapenting, bungee jumping, river rapelling, trekking, horseback riding and paragliding.
Ciudad Perdida is quite possibly one of the worlds great adventure treks. It's a gruelling 5 day hike high into the rainforest to some spectacular, recently discovered ancient ruins. This is Indiana Jones style exploration, and a real travel highlight.
If you're into off the beaten track type adventure tours in Colombia, consider travelling to the remote La Guarija Peninsula. In La Guarija, many parts are only accessible by 4WD vehicle - there's empty Carribean beaches, wildlife viewing options and small indigenous Wayuu communities that can be visited.
Those seeking soft adventure tours in Colombia shouldn't miss out on Park Tayrona, which offers some of Colombia's finest remote beaches. There's little tourism infrastructure, so you'll be camping (unless you can afford the luxury Eco-Habs), and hiking through rainforest trails to discover empty, idyllic beaches.
Leticia offers adventure rainforest tours, wildlife watching and canoeing in the Amazons' rivers. Adventurous travellers continuing on to Brazil might consider crossing the border to Tabatinga and getting the 4 day Amazon river cruise to Manaus, capital of Brazil's Amazon area.
Go and seek adventure in Colombia! The country is full of options, just check local safety conditions before heading off the beaten track.