Visit the WWII bunker where the British won the battle for the skies.

One of the largest public collection of historic armored and military vehicles in North America.

The world's largest military aircraft cemetery.

America's only nuclear missile silo open to the public.

Home to Hollywood history and a very special salt crystal.

Cold storage for agricultural biodiversity.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This sinkhole was created by a tragic industrial accident and continues to ravage the surrounding landscape.

Memorial to one of the most fatal fires in both circus and U.S. history.

A moving memorial to the fallen and missing from WWI trenches.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

"The House That Love Built" is shying away from "The House That Ghosts Love."

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

This 16th-century monastery has been turned into a surrealist architecture compound.

Site of one of World War I's most horrific scenes.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

A park and memorial dedicated to the victims of the deadliest school massacre in American history.

A beautiful and classically designed villa, with an hourly infestation of monsters.

This magnificent Cincinnati graveyard is also a popular public park.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.