Marvel at this immense work of art that greets arrivals to the city.

These Stolpersteine located in Spain honor Republican soldiers who perished at the hands of Nazis after the fall of France.

The world's most elegant power lines.

The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Bacteria and algae give the salty water its bubblegum hue.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

A statue dedicated to the founders of communism.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

This sculpture used famed boxer Joe Louis as the inspiration behind its body.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This Underground station has been a popular filming location for decades, even before it closed.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The bronze uniforms commemorate the vital role of women during World War II.

The commemorative stone column conceals a secret laboratory.

A measuring mishap led to these artificial stone ladies losing their stomachs.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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