The vaulted ceiling is home to a scurry of “squirrelgoyles.”

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

One of the only single-person private gravesites in New York City.

Visit the monolithic tomb of America's most famous general.

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

A Gothic-style abode built to accommodate the church's three resident peacocks.

This was one of the first (and last) university-built and operated nuclear reactors.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

The "Seinfeld" diner.

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

Elevated freight railway turned wildly successful urban park.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

This massive, ancient stone was disassembled and then put back together again.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.