9. Bikini Atoll, The Marshall Islands
With an island named Bikini, you would assume it must be this amazing paradise full of hot girls and plenty of beach volleyball and refreshing piña coladas. Nope. However, if you’re cool with taking cancer home as a souvenir, this is the place for you. A nuclear testing ground for the US military in the 40s and 50s, more than six decades later the island still has areas with high levels of deadly radiation.
10. The Kokoda And Black Cat Trails, Papua New Guinea
Where to even begin, guys. First, this 60 mile (100km) trail between the northern and southern coasts of Papua New Guinea involves 10 hour-a-day treks that include hiking mountains, swimming, and walking through hot, steamy jungles full of wild animals, leeches, and natives who aren’t always very friendly. And malaria-carrying mosquitos? You better believe it!
Oh, and you have to carry all of your supplies with you since it’s not like you’re going to find a Burger King or Wal-Mart along the way. Dehydration and broken bones are pretty common, so bring plenty of Gatorade and some spare bones, we suppose.