Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

The writing studio of an American adventure author, built in the style of a medieval castle.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

Follow the original medieval paths that wind through this intriguing section of the city.

An incredibly well-preserved piece of ninth-century Viking poop.

One of the shortest streets in York has an especially odd name.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The bronze uniforms commemorate the vital role of women during World War II.

The last four extravagant street signs of London's historic banking street.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

A memorial for public executions that dates back to the 14th century.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

This Roman relic was discovered in Scotland by a mudlarking ferryman.