A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

During the 19th-century, this park was a vital trading fort.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

This museum located in the "Corn Cob Pipe Capital of the World," chronicles the history of cob pipe.

When he found his hometown was no more, Lowell Davis decided to recreate a "new" ghost town from scratch.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

Possibly the smallest church in the world floats in the middle of a pond.

The shared home of a utopian commune that practiced "free love" a century before the hippies.

The highest point in Texas is capped by a big silver pyramid.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

The only arched bridge made of stone on the entire Mississippi River.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Home to items never before seen by the public.

The United States Capitol's former columns still stand.

One of few surviving standpipe water towers in the U.S.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.