America's only city hall with minarets took architectural cues from Ali Baba and the Forty Thieves.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

This overgrown Victorian chapel made of corrugated metal looks utterly out of place.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

A remote gravestone on the moor marks the spot where a teacher's body was found under mysterious circumstances that remain inexplicable.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.