A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

Once the tallest building in Detroit, this Gothic church houses some of the oldest stained-glass windows in the country.

Detroit’s downtown castle is one of the oldest structures in the city.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

A collection of witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

The angel of death appears to weep black tears at this grave marker.

Opulent downtown movie theater now houses cars as an indoor parking garage.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

The birthplace of the Ford Model T is now a museum full of antique cars.

The bones of an old zoo crumbling in the shadow of a new one.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Amsterdam's Red Light District leaves little to the imagination.

A small burial plot formerly stranded in the middle of a road.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.