Northern Kentucky’s very own Notre Dame showcases intricate stained glass and the bones of saints.

305 homemade stone stairs wind their way up the Hamilton escarpment.

The Painted Ladies of Ontario aren’t your average beach homes.

Dozens of tiny doors dot Newport's Mansion Hill neighborhood.

A shop for all your magical needs and notions.

A wartime promise becomes a shrine to Our Lady of Lourdes.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

This tomb was fashioned with a sliding window for a grieving mother who struggled with her daughter's death.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This graveyard is home to the so-called "Witch's Circle."

A wonderland of caves in eastern Iowa.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A Jenga-style cylindrical tower of books that appears to go on forever.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Could it have picked a better place to land?

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

A striking bronze sculpture of a Roman goddess with two hound dogs for company.

This muddy wooded valley and the ancient structures it hides are said to be the favored haunt of the legendary Friar Tuck.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

Final resting place of a 19th century gold prospector and convicted cannibal.

The only structure left with direct ties to the Salem witchcraft trials of 1692.