One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

19th century cemetery hidden in Brooklyn's Prospect Park.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

A mysterious stone embedded at the base of a historic Boston building.

The most confusing clock in New York.

This museum explores the grim reality of life in the earliest British colonies in America.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The site of the deadly Triangle Shirtwaist Factory Fire.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

Home of a 28-foot tall stalagmite known as the War Club.

Step into a pastel time capsule where candy is truly dandy.

Painstakingly built dioramas sit unnoticed in a Boston office building.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.