Mysterious rocks that ring musically when struck.

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

From scholastic to sepulchral - now under reconstruction.

An unassuming secret door once led to a legendary watering hole.

A celebration of capitalism in Midtown.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Even Henry David Thoreau found this glacial pothole irresistible.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

America's post-nuclear-attack chambers of Congress.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Step inside Lucy, the world's largest "elephant."

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

At 207 feet, one of the world's longest continuous escalators.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Arlington Cemetery exhibit dedicated to death and grieving.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.