A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Obelisks and stone pineapples in the Irish countryside.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Natural cathedral designed by Italian artist Giuliano Mauri.

The most visited, and possibly most controversial, museum in Germany.

One part antique store, one part curiosities hodge-podge.

Japanese island famous for poison gas and fluffy bunnies.

Sloth rehabilitation center in the jungle of Costa Rica.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Abandoned railway line circling the city of Paris.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A once grand hotel is being retaken by the wilderness it once capitalized on.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

In paradise, feral pigs have claimed an island all to themselves.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

One person's lost luggage is another person's treasure.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

An Australian lake whose pink hue defies scientific explanation.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Collapsing castle on the Hudson river was once the storage site of military surplus business.