Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

Shoreline strewn with the remains of ghostly fallen trees.

100-year-old shipwreck you can walk up to at low tide.

"The House That Love Built" is shying away from "The House That Ghosts Love."

The first park built over a freeway is a brutalist masterwork.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

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

This spectacular track has run continuously since 1882.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

An abandoned stretch of highway, deteriorating next to the operational one.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Ride the subways of yesteryear.

A giant Troll lurks under one of Seattle's oldest bridges.

A tiny twin to Seattle's Fremont troll hides from the Florida sun under the Atlantic Boulevard drawbridge.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The largest wooden building in the world now houses a fascinating collection of aircraft.