At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The romance of early commercial flight still fills this Art Deco destination.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

At 207 feet, one of the world's longest continuous escalators.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Remnants of a storybook amusement park hidden behind a strip mall.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

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

Once America's tallest structure, now a Baltimore landmark.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

There’s a hidden military meme engraved on the World War II Memorial.

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Home to items never before seen by the public.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.