Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A beautiful Victorian-era cemetery, complete with a miniature village.

Stroll through a wonderland of stupendous moss-covered trees.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A winding path built in secret on the edge of the continent.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A crumbling hospital from the 1850s on Roosevelt Island.

A geological bull's-eye visible from outer space.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Tracks of ceratosaurus and Coelophysis rhodesiensis tracks can be found fossilized in the sandstone near Mt. Etjo.

Wondrous stalactites house thousands of bats in these African caves.

Welded sphere dropped from space.