The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

An abandoned building that once tightened a power line that stretched across Messina Strait.

A network of underground water channels that dates back to the Middle Ages.

This uncanny fresco celebrating the "triumph of death" was split into four pieces to be moved to another museum.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

Italian cave with exceptional acoustics and an unsavory history.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

Nature and beauty amidst pollution and industrial wreckage.

Phil Mortillaro uses keys to bring art back to the Village.

Detailed facade of a brownstone in Boerum Hill.

A dilapidated dock tells the story of Titanic's missed arrival.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A Manhattan office building is home to the world's largest chess board.

One of only two remaining Victorian-era greenhouses in New York.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

New York's southernmost subway station is whimsically wavy.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

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