This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

The only remaining building in New York to see the inauguration of a president is being slowly overtaken by a grocery store.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A monument stands to the famous suffragist who penned the declaration for women's equal rights, including the right to vote.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

This sprawling bookstore spans four floors and has more than a million books in stock.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Op-art architecture designed for happiness.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The only home of the famous French impressionist painter open to the public is now a museum and bed and breakfast.

A little piece of Paris in the sultry south of the U.S.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

The preserved house of a jazz legend still echoes with his music.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

The 28-foot granite map plots the locations of 40 theaters in New York City.

The highest point on the island known for buildings that touch the sky.