The site is dedicated to an investigative journalist whose murder triggered a political uproar that changed Slovakia forever.

A single oak tree rises out of the waters of Loch Lomond.

This mural condenses 96 miles of one of Scotland's best-known trails into a unique art display.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

This sculpture encompasses the emotion of rail travel.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A window into a long-lost world, these colorful tiles advertise a long-defunct range of purgative teas, harmless smokables, and diarrhea cures.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

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.

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

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.

According to the local legend, these boys and ducks were turned to stone by an angered water goblin.

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

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.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

A lush indoor jungle fills this bustling Madrid transportation hub.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."