An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

A former connection to City Island, it has been abandoned since the 1930s.

The loneliest island in New York.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Mysterious installations bring levity and light to a sometimes stodgy city.

A fiery crater has been burning in the Karakum Desert since 1971.

A museum dedicated to a unique ecosystem.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

The first declared National Monument in the United States.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

If it wasn’t for an innovative use of quilts during a crisis, the city of Panguitch might not exist today.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Mountain where Jesus was first tempted by the Devil.