Climb inside an iron crystal magnified 165 billion times its normal size.

Brussels' favorite peeing boy has a sister.

Meet the bronze beloved pet to a family of famous peeing statues.

This unattributed sculpture in Amsterdam is hiding in plain sight.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A beautifully eclectic mix of architectural styles.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

A little sculpture with a large wardrobe.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Abandoned railway line circling the city of Paris.

One architect's organic, human-centric design has been fully realized in this alien art house.

France's most famous cemetery, with some of its most curious tombs.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A series of abstract, silly sculptures represent the works of a great modern classical composer.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

A sulfuric martian landscape that looks far better than it smells.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Three columns of volcanic rock shoot out of the ocean.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.