Twelve natural mummies are displayed in the crypt of this former monastery school.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A painfully obvious spy house sits right across the street from the Russian Embassy.

This groundbreaking 16th-century map is known as "America's birth certificate."

Where you can hail your favorite fictional commanders-in-chief.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

A Nesting Doll of Churches.

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

A collection of objects supposedly singed by the hands of souls in purgatory.

The astonishing collection of an infamous criminologist.

The underground sanctuary of a mysterious ancient cult.

The mummified relic of St. Catherine sits forever on a golden throne.

A fake medieval village in the middle of Turin.

Vast network of air raid tunnels beneath Lombardy's capital.

Stalactites and stalagmites in a beautifully lit cave.

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

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Venice's "Island of the Mad."