The remains of the worst maritime disaster in the history of the "Graveyard of the Pacific."

Beautiful mostly-abandoned town only accessible by sea-worthy boat or plane.

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

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

Known as the site of 'El Dorado,' this mysterious lake is rumored to hold gold beneath its waters.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

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

An explosion of natural color known as "the river that ran away from paradise."

Storied crypts fill the most famous cemetery in Colombia.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

Four-story concrete hotel never opened to customers.

The king of U.S. high points towers over every other peak on the continent.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

The ghostly remains of what was once the world's richest copper mine.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Largest private bird collection in Iceland, formed from a tragic accident.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

Northern Ireland's Brobdingnagian stepping stones.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.