Beside some power panels, a plaque celebrates the history of an alternate world.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

An enormous dragon scales the walls of this 17-story temple.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

An amazing collection of wax anatomical models and terratological models.

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

Haunted by its violent past, this colonial bastion was the largest Spanish military installation in the Americas.

This stone complex marks the urban center of a lost civilization.

Tucked behind the Institute of Neurological Science down a decrepit street resides the largest display of human brains in Latin America.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

The most loyal of little dogs, or a Victorian era publicity stunt?

This beach-side arcade is believed to be the oldest penny arcade in America.

Mysterious stone tower featured in many alternative histories of the New World.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This monumental fountain has moved around the city multiple times.

A rococo room covered entirely in porcelain originally constructed for another royal residence.