This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The angel of death appears to weep black tears at this grave marker.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Rebuilt remains of a temple to Roman god Mithras.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This unlikely memorial honors the Canadian and Portuguese laborers who felled trees for the Allies in World War I.

Enormous terracotta heads of Queen Elizabeth and Prince Phillip can be seen on the side of the road to Windsor.

Locals believe the purity of this huge, untouched Arctic lake could be the salvation of human civilization.

A statue honors the children who fought Nazis in Poland.

A wunderkammer of mysterious objects and stories.

Two thirds of this Montreal neon icon has survived to flash another day.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

The main gates have been locked since 1745 and will remain so until the Stuart Dynasty returns to the throne.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

The biggest museum dedicated to insects in North America, one of the largest in the world.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This former coal gasification plant found a curious second life as a popular public park.

An autonomous oak in Alabama.

A white oak with property rights.

The second oldest continuously operating bar in Louisiana.

This failed condo development was reborn as a street art hub.

The only surviving leech house in the United Kingdom was a home for bloodsucking worms until the 1900s.