A roadway designed for a visiting monarch.

This mundane post marks the old location of the city's main postal hub.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A sweet symbol marks the place where torturous executions were once carried out.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

An artist's whimsical transformation of everyday objects.

These free-roaming horses were once destined to disappear from the land.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Mountain where Jesus was first tempted by the Devil.

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

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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

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

This fountain was designed to honor the man who helped bring water to Barcelona.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

This cemetery features modernist statues as strange as its name.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.