Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

This sublime architectural marvel is a rare example of an expressionist church.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A tall karst islet popularized by 007.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

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.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

This abandoned Greek island was the last active leper colony in Europe.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

Roman ruins top white travertine terraces formed by ancient hot springs.

A kaleidoscopic warehouse-maze of handmade neon signs.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Amsterdam's Red Light District leaves little to the imagination.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Belfast's namesake river still winds below the city center, hidden from sight.

This massive monument has been telling the time for 150 years—at a slight angle.

A Victorian marvel of engineering is now a 21st-century tourist attraction.

Step into Narnia at this small park featuring statues from "The Lion, the Witch, and the Wardrobe."

These murals stand as reminders to the troubled history of this Northern Ireland city.

It was once nicknamed "the most bombed hotel in Europe."

A beloved upside-down beacon off the coast of Northern Ireland.