A tiny piece of the Moon is embedded in this stained glass masterpiece.

The most accurate timepiece in the world.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Home to items never before seen by the public.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The house where John Wilkes Booth conspired with his co-conspirators.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

A bit of retro transportation flair preserved in the world's largest department store.

Elevated freight railway turned wildly successful urban park.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This stunning home looks like it belongs in medieval Europe, not North Carolina.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

Stairs often replace streets on the steep slopes of this old mining town.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A world-class observatory in the California desert.

The Giant Lemon of Lemon Grove.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.