Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

This recipe is set in stone.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

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

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

Collect holy water from a Bronx grotto.

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

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

This small, hidden cove is home to abandoned boats.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The site of the deadly Triangle Shirtwaist Factory Fire.

Historical figures from New York City's Catholic community reside in Midtown.

A Manhattan Episcopal church with an eerie underground crypt.

Holding the most bodies of any cemetery in the United States.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Walk into the 19th century without leaving Brooklyn.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Avoid gangster interaction while window-shopping.

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

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

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

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

Once America's longest-manned military fort, now an abandoned hulk.