The attic of a four-century-old canal house hides a clandestine church.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

Museum preserving torture methods from the past.

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

A cluster of headless, armless sculptures looms within a popular Polish park.

An impressive monument to Poland's independence.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The stunning interior of this Gothic church is covered in ornate gold details.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Mountain where Jesus was first tempted by the Devil.

This cemetery features modernist statues as strange as its name.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

An eerie collection of the surviving structures from a past celebration of the future.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

"There's nothing there," and other lies the KGB told us.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.