The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The first island in the world designated a light-pollution-free astronomical observation point.

Fascinating town where normal life interfaces with the occult.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

This beautiful spit of land was once the summer playground of the king of Spain.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

Northern Ireland's Brobdingnagian stepping stones.

This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

A monument to a 19th-century Irish woman whose murder inspired several literary works.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

The elaborate crypt where Peruvian heroes of the War of the Pacific were laid to rest.

A monument to Cuffy, a rebellious enslaved person who became a national hero in Guyana.

A brick arch is all that remains of this Dutch fort, once a focal point for colonial power struggles in Guyana.

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

This small bridge serves as a symbol of South America's independence.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

This remote Moravian mission brought Christianity—as well as devastation—to the Inuit people.

This former sugarcane transport tunnel is now a portal to a lovely beach.

A collection cataloguing one of the most brutal dictatorships in modern history.

After Christopher Columbus died, his son built a fancy house to rule from.