Breathtaking and huge 430 year old maps of Italy.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

France's most famous cemetery, with some of its most curious tombs.

Peace Park and the Atomic Bomb Dome.

Portlandia is the second-largest copper repoussé statue in the United States.

A monument to the defenders of the Arctic in Murmansk, Russia.

An abandoned colonial French prison notorious for its hellish conditions.

Ferdinand Magellan dubbed the world's largest water village the "Venice of the East."

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

An enormous, inside-out glass globe built in 1935.

Florida castle built with aluminum printing plates.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Death rituals and sacrifice inside a Peruvian megalith.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

Concrete strongholds stand guard over the Golden Gate.

A marvel of Byzantine engineering under the streets of Istanbul.

The world's most remote airport.

Postal archives over 150 years old offer a window into Singapore's culture and tradition.

A miniature city, once ruled by the Queen of the Netherlands.

Housing a morgue, rare and confiscated weapons, and autopsy remains, the Vancouver police museum displays the dark side of Canada.

This Elizabethan hedge maze is one of only six in North America.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

Monasteries on rock pillars, once accessible only by frayed ropes.