This woodland architectural installation acts as a camera obscura for the heavens.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

One of the last active volcanoes on the Eastern seaboard.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

A 30-acre garden inspired by the principles of modern physics.

A subterranean playground in an abandoned slate mine.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

The remains of centuries of copper mining appear like an alien landscape.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The atmospheric road was never meant to be so creepy.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

An enormous park-like oasis, full of famous Chicagoans' graves.

A speakeasy takes on Chicago's drinking culture.