A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

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

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

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

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

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

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the only memorials dedicated to journalists who died in combat.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.