An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Eat the ultimate iteration of Portugal's most beloved pastry.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

Once a black market electronics marketplace, now an otaku shopper's paradise.

Meet the world's longest tapeworm in a collection that really gets under your skin.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Peace Park and the Atomic Bomb Dome.

An eerie reminder to the horrors of World War II.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

World's largest collection of serial killer artwork and other macabre exhibits.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.