Once the home of a hermetic monk, this cave now houses a small church.

America's smallest "national forest" has only 33 trees.

Railroad came. People came. Railroad left. Town died.

Two stunning 17th-century libraries and a cabinet of curiosities.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The curiosities and wonders of pharmacy in a delightful historic building.

Hoax, mistake, or evidence of dinosaurs in human times?

Antiques by the Bay.

The curious and tiny collection contains some very odd objects.

A giant portrait of an ancient king looms over the river.

Russian Orthodox church built on an Antarctic island.

Spiral labyrinth hidden in the hills above Oakland, CA.

Museum dedicated to awful artwork.

Large Hadron Collider and the Birthplace of World Wide Web.

The longest burning light bulb in the world.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.