A charming beach town in Turkey captures all the colors of the rainbow.

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

The sunlight passing through the opening of this huge cave system creates a magical effect.

It's a mystery why these remains were found with no traces of their bodies in sight.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Scotland still bears an enormous scar of its Roman past.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

This isolated island is often capped by its own fluffy cloud.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

The fences outside some of South London's estates are made from recycled World War II stretchers.

A journey through 430 years of bulbiculture in the Netherlands.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

This whimsical fountain pays tribute to Toronto's four-legged friends.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

This 18th-century folly is one of Europe's rare "garden mosques."

A black cottonwood gets a second life as a home for books.

A modern reimagining of a medieval city gate.

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

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

Australia's only active volcanoes and highest peak are located on these remote islands thousands of miles away from the mainland.

A lush indoor jungle fills this bustling Madrid transportation hub.