Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

One of the first Second Empire-style buildings constructed in North America.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

This statue of the "father of television" stands prominently in the United States Capitol.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

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

The world's oldest soul food restaurant is also one of its best.

This taxidermy horse was a Civil War hero.

A public art jibe at one of the United States’ oldest and longest-serving senators.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

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

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The district's only illusionarium supports free writing programs for local students with every purchase.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

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