3. Costa Rica
Costa Rica is known to attract the most hardcore travelers around the world with its wide variety of heart-pounding outdoor activities. If white-water rafting is your choice of an adrenaline pumping activity, then you are in the right place because the planets wildest rapids can be found here. The Reventon River and Pacuare River hosts more than 20 class 3 rapids. Four of these rapids burst and go through and in between 100-foot tall canyon walls. But if extreme white-water rafting is too much for you, then you can try surfing its world class surfing sites. You can also tour one of the country’s 5 active volcanoes or do a zip-line across Costa Rica’s tangled jungle canopies.