Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

The little-known final resting place of one of America's greatest writers.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

A castle built for love, and abandoned due to heartbreak.

This historic lighthouse was well known for the large number of women who served as its keeper.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

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

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

A grotesque Fiji merman dwells within this traditional Dutch-style building.

The world's largest fully steerable radio telescope.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

This estate on the banks of the James River was home to a Founding Father, two presidents, a famous bugle melody, and what some say was the actual first Thanksgiving.

Dine like an American revolutionary at Colonial Williamsburg.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Elvis's own personal tropical hideaway.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A tiny one-room church built after one man's prayer for healing was answered.