You'll want to leave a light on when you read this.
Halloween may be in October, but for anyone with a passport and a strong constitution, the thrill of visiting a truly scary location can happen any time of the year.
These aren't kitschy haunted houses or charming inns with sordid pasts. Instead, the most frightening places on Earth are truly unnerving—and they'll often put you in the presence of literal (rather than supernatural) death.
Paris's catacombs, for example, may be a popular tourist destination—but being surrounded by the bones of more than 6 million skeletons is still entirely frightening.
And just the journey to Dargavs—a collection of quaint, Nakh-style crypts—is harrowing. Travelers must brave a three-hour drive along twisting mountain roads in southern Russia. Fog is known to rapidly flood the valley and overtake visitors seeking the City of the Dead.
You can frighten yourself silly on a global ghost hunt, or simply pay your respects to the past. Either way, the 13 scariest places on Earth are not for the faint-hearted.