These ancient sacred grounds granted amnesty to those who managed to reach them.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The mysterious round rocks of Schooner Gulch.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

The land is home to swimming ponies and a legendary 18th-century treasure.

A historic covered bridge, only one of two remaining in North Carolina.

An unfinished rail tunnel that has since been used to house cheese and bats.

4,000 monkeys used for medical testing on an island off of South Carolina.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.