The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

An abandoned asylum where patients have been forgotten but their possessions remain.

On a dusty county road sit the ruins of a ghost town's abandoned church.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

These crumbling foundations are all that remain of the once-stately 1840s manor that gave the town of Bradenton its name.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.