The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

A turquoise lake within a volcanic crater.

A swing to dangle you off the very edge.

It took 160 years to complete the most ornate church in Ecuador.

Quito's historic, main square dates back to the 16th century.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

Colombia's biggest botanical garden contains plants from all across the country.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

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

The most powerful waterfall in all of Europe.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

The colonial city's social history is reflected in its fanciful door knockers.

An ancient city hidden in the heart of the Sierra Nevada mountains.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.