For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

An overlooked memorial honoring the local Washington residents who died in World War I.

There’s a hidden military meme engraved on the World War II Memorial.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

Resonating tubes make music from highway overpass.

More than 200 unconventional musical instruments that anyone can play.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

An abandoned church gets a second life as a massive beer hall and event space.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A museum dedicated to exhibiting remarkable outsider art.

This translucent sculpture represents a quintessential component of New York City's skyline.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.