The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

The morbid items in this small and hidden museum are not for the weak stomached.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

An automaton perched above an classic clock and watch store

An old, deep well, connected with a miraculous, divine rescue and the patron saint of Madrid.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Berlin's old airport.

A collection of abandoned typographic signs from Berlin and beyond.

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

Power line with pylons on huge concrete bases to prevent terrorist attacks.

Shortest overhead power line in the world.

The atomic museum in the basement of this German castle displays long strands of replica uranium cubes.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

Enter the cabin of a life-sized Hindenburg replica.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A unique collection of gilded age mechanical pianos.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.