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Most of the paranormal attention in New Mexico has focused on Roswell and the alleged alien activity there, but, there's plenty of unexplained phenomena to go around, and aliens aren't the only strange visitors to make their presence felt.

While the city is known for its spirit of democracy, there are ghostly spirits in the city that have elected to stay behind to have their voices heard.

Don travels to colleges where there may be portals to another world, including Notre Dame University. Also see Illinois State, where a phantom librarian works, and Keene State College, where mysterious noises come from a sealed dorm room.

See locations in Florida that are said to be haunted. Locations includes a tree that was used for hangings in Key West, a pub with a British ghost in Palm Beach, and a hotel in Clearwater with a gem-stealing ghost.

From Mexico's Yucatán Peninsula south to Belize, the Maya vanished hundreds of years ago. But where did they go? And what did they know? Search the dense jungles, ancient ruins and underworld for secrets to help unlock the great mystery of the Maya.

We’ll visit the ghosts of Boston and beyond, whose presence and as much a part of the city's history as tea parties and beans.

Beyond the Sears Tower and the Magnificent Mile lies some of the scariest sites in America.