This historic hiding place, often used by people escaping slavery, is a testament to a heroic struggle for freedom.

A glowing underwater cliff attracts marine life and divers in equal measure.

An ancient city exhumed from the depths of the ocean.

A way to take your secrets to someone else's grave.

A ring of soy sauce bottle bases decorate an important Singaporean landmark.

The oldest Muslim cemetery in Singapore, with a strong royal connection.

Phil Mortillaro uses keys to bring art back to the Village.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Cockroach Museum features roach celebrities and live hissing cockroaches.

The Guardian of Tallinn.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

The oldest continuously operating pharmacy in Europe.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

It houses the remains of a 17th-century version of the Titanic.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A library and shop devoted to the body, mortality, and bringing to light forgotten or neglected histories

The flagship building of an early national restaurant chain is a superb example of terra cotta art.

New York City's only radical feminist independent bookstore.

Nope, not Washington Irving's house.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

A New York warehouse filled with an enormous amount of goods saved from the landfills and donated for creative use.

The first piece of public art dedicated to LGBT rights.