Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This marvelous array is one of the largest collections of mechanical instruments in Europe.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

One of the world's largest shopping malls covers an area of 15 million square feet—and it's still set to grow.

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

One of the first monuments dedicated to the accomplishments of the great Vice Admiral, Horatio Nelson.

An abandoned shipping control tower looks like a satellite perched at the end of a pier.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Browse through a century of this principality's first popular export.

Liechtenstein's royal family calls this medieval alpine castle home.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

It houses the remains of a 17th-century version of the Titanic.

A real flying saucer, contracted by the U.S. Air Force.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

This ordinary street was made infamous by a legendary visit from the devil.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.