Antartica is the only place on Earth you’ll never visit without permission from multiple governments. No cities, no tourists roaming freely, no commercial industries—and yet, more than 50 nations have signed an ironclad treaty to protect it from development. What is Antarctica really hiding—and why can’t we just go see for ourselves? This is why you’re not allowed to travel there.

Traveling to exotic destinations can be thrilling, but some places come with an added element of danger. From volatile weather to political instability, wildlife encounters, or challenging terrains, these tourist hotspots require more than just sunscreen and a guidebook. Here’s a look at the world’s most dangerous tourist destinations and why they continue to captivate adventurous travelers.