This island off the coast of Brazil is illegal to visit. Why? This is Snake Island. It's populated by 4,000 golden lancehead viper snakes, and they're not so friendly to humans. What would happen if ...

Just 20 miles off Brazil’s southeastern coast lies one of the world’s most frightening and mysterious islands. Ilha da Queimada Grande may be small, but it is home to some truly dangerous residents ...

Most places on Earth can be explored online, and many can be visited in person with the right planning. But a few spots are completely off-limits by law, by nature, or by design. These aren't just ...