Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The long, arduous journey of the stones of the Abbey of New Clairvaux.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

Balconies that have a most unusual accent.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The remains of a ruined mansion memorialize the 1906 earthquake.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

'Cause the fence start shaking, the earth was quaking.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

A strange house built only at night, with rumored mystic inspiration.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

World's oldest and largest space launch facility, once a secret missile testing site.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

Museum celebrating the achievements of the Soviet space program.

Ruins of a 10th century church tucked away deep in a botanical garden.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

Empty since 1989, now falling into ruin.

A museum of carnival attractions where you are invited to ride the rides.