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

Every winter, water dripping from a pole creates an ever-changing ice sculpture.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The massive machine creates cracking displays of indoor lightning.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Bizarre Cavern.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

The only place to see live frogs don pigtails and top hats, then eat their scrumptious legs.

A treasure trove of rare and exquisitely detailed antiques

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

This grand gothic brewery has been pumping out suds for over a hundred years.

The walls of the iconic dome are hollow and have a secret stairway.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Browse through roughly 130,000 titles in the world's largest independent video rental store.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Two small markers remember the Alamo's feline protectors.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.