This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

Connecticut's shot tower is near the end of its life.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

Little Red Lighthouse under the George Washington Bridge.

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

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

This former crime corner has been turned into an eclectic community center.

A modern addition to the Greenpoint skyline.

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A decommissioned military complex that's now a modern industrial park.

Try not to get slimed in Tribeca.

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

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

Sniff the Titan Arum's rotting flesh.

Rummage through this sunken ship, but leave your scuba gear at home.

Elevated freight railway turned wildly successful urban park.

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

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This park contains a number of standing stones meant to heal and inspire.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.