If you seek an active and adventurous vacation far from the beaten path, turn to G Adventures. Founded in 1990, the company offers adventure tours on seven continents and is committed to low-impact travel and sustainable tourism in the far-flung destinations visited.

Among G Adventures' vast selection of itineraries are Nile and Amazon river cruises. On the Nile, you'll cruise on a felucca -- a small, traditional wooden sailboat. While the vessel doesn't have the amenities featured on larger Nile ships, it allows you to experience the river as some of the locals do. The company's Amazon boats are larger and carry more guests but deliver a similar authentic experience on the upper Amazon in Peru.

Most of G Adventures' Amazon and Nile cruises are combined with a land tour. One price covers your river cruise, hotel accommodations, all transportation and guided sightseeing.