Extraordinary sculpture garden created by an eccentric English poet.

A layered tribute to the work of mosaicist Isaiah Zagar.

Where America's first doomsday cult awaited the end of the world.

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

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

A glacier pocked with ice caves and surrounded by rainforests.

The world's largest bioluminescent area was undiscovered by science until 2005.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

An emerald-green grotto just a short trip from Austin.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

A once grand hotel is being retaken by the wilderness it once capitalized on.

The Hudson River School comes alive at this palatial estate.

Mysterious rocks that ring musically when struck.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

"World machine" built by an untrained Austrian farmer.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

The personal charnel house of Anton Bruckner.