One kilometer of thick brass rod laid out before your eyes.

A room in New York City that contains 250 cubic yards of dirt.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A semi-scholarly approach to sex.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

One of the few places where you can visit a cenote and Maya ruins at the same time.

These azure waters were thought to lead to the Mayan Underworld.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The lost town of Neversink, sunk by New York City.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

The second largest maple syrup producer in the U.S. runs a high-tech operation.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Elevated freight railway turned wildly successful urban park.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

The most confusing clock in New York.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

This innocent-looking townhome is actually a subway exit.

Love, knishes, and best wishes from this legendary Lower East Side bakery.