Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Colorful and chaotic stacked hotel in North Holland.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Macabre astrological automaton clock dating to the late 1400s.

A series of playful yellow penguins share a serious message about the environment.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A Baroque mansion with ties to legendary magicians and alchemists.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

A historic and beautiful Art Nouveau chamber in a historic railway station.

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

The house that took a plunge into the facade of a museum.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The beautiful baroque library of the Hapsburg empire.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.