The Amazon, Ecuador
The Amazon rainforest is the last green frontier on earth. It is estimated that 20 percent of the earth's oxygen is produced in the area. It encompasses 1.7 billion acres and runs across nine South American countries. It also holds the largest collection of living plant and animal species. Ride along the Amazon River on a ship, take a twilight hike to observe nocturnal animals, and just enjoy the wild, untamed forest life. It will be a travel adventure you'll never forget.