The last manually operated turntable ferry in the world.

The absurd creation is a compulsory destination for selfies in Buffalo.

The fountain marks the area where hundreds of accused witches were burned at the stake.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

A record-size collection of wild-haired troll dolls tells the story of the mythical creature's roots in Scandinavian folklore.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A perilous medieval road leading right into the sea.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.