A no-frills, DIY nature preserve manned by a U.S. expat who has dedicated his life to turtle conservation.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

Cathedral carved out of salt, located a mile below the earth's surface.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

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

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

No one knows for sure why this town's dead refuse to rot.

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

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

This whimsical home made entirely from clay is basically a giant piece of pottery.

This colonial town in Colombia sits around the largest stone paved square in South America.

The entire town looks like a slice of Spain that was carted across the ocean and plunked in the Andes.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

Enchanting cave with a river crashing through the roof.

This picturesque mansion has gone from opulent ruin to nature museum.

A self-taught astronomer fell in love with the stars and built his own observatory in Colombia.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

The enormous appendage offers spectacular views of Colombia's Huila Department.

Only gap in the 30,000-mile span of roads called the Pan-American Highway.

The centuries-old trees are draped with Spanish moss to make them look like wizened elders.

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

This city park wants you to take your shoes off.

Erected in 1803, it is the first astronomical observatory that was built in the Americas.