A Roman monument to their own civil engineering prowess.

An old spa town in the mountains of Romania where, according to legend, the great hero Hercules once bathed.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A chemical factory damaged by two earthquakes and an explosion that became abandoned after bankruptcy.

A giant roadside black bird marks the location of this eclectic local mall.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

Standing 191 feet tall and measuring more than 55 feet in circumference, this is the world's tallest spruce tree.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

This tree has witnessed nearly 1,000 years of history.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

Shoreline strewn with the remains of ghostly fallen trees.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

One man's eclectic collection of treasures found at sea.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

Stroll through a wonderland of stupendous moss-covered trees.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

An abandoned World War II bunker is part of a chain that runs throughout Washington.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

A museum dedicated to the history and exploration of both popular music and science fiction.

A community gathering place that once housed half-ton tanks and the World's Fair.

A wall of chewing gum moonlights as collective art.