Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

A naturally beautiful, seemingly bottomless deep blue spring.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

Striking occult iconography on a medieval German church.

The hallucinogenic center of the ancient world.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Ruins of a German Castle on top of a towering stone pillar.

Renaissance villa and gardens complete with a tormented colossus.

Thousands of well-dressed mummies below a monastery.

Stalactites and stalagmites in a beautifully lit cave.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."