This former lieutenant governor's home is brimming with curiosities.

The "Seinfeld" diner.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Make your reservation to have coffee with some kitties.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

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

Oregon's unexpected high desert, displaying layers of time in a colorful show.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Ride the subways of yesteryear.

A modernist landscape of water and sci-fi concrete.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

One person's lost luggage is another person's treasure.

The largest self-built castle in the U.S., six decades in the making.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

One of only two commuter aerial tramways in the United States.

A self-built castle made by a mysterious man.

This naturally-sourced hot spring is now home to a clothing-optional resort.