This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Cold war icon and onetime "hole" in the iron curtain.

This German bone house contains the remains of some 20,000 souls.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Look closely and you’ll notice that the color changes a third of the way up the tower.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Tucked in the back of this amazing antique store is an important piece of medical history.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

A snapshot of the city's fascinating voodoo culture.

The blinking light atop the iconic landmark has been sending secret messages for decades.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

One of the few remaining monuments dedicated to South Boston's Irish heritage.