Carved fountains poignantly placed in parks and in front of special monuments.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Fantastic views and thousands of love locks.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

Luxembourg's most popular statue since 1923 has been missing for... 26 years!

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

Statues of a fire-breather, a clown, and a whole performing troupe celebrate Luxembourg's creative side.

Nicolas Schöffer's massive interactive sculpture was assembled in 1961 and brought back online in 2016.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

This 19th-century fountain features sculptures of little gnomes that help with chores.

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

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

A cynical face-off exposing the cost of war.

A striking steel sculpture that was moved to an out-of-the-way location.

Two thirds of this Montreal neon icon has survived to flash another day.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Immortalized in bronze, this frazzled student will be glued to his screen for centuries.