The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

This woodland architectural installation acts as a camera obscura for the heavens.

A water pumping station disguised as a residential home to assuage concerned neighbors now tricks most passersby.

A giant cement churn carries the legacy of American resilience, unity, and greed.

The sole remaining outpost of a once-thriving South Carolina chain still sells “pic-a-nic” baskets.

This airfield is home to a number of retired vintage planes in various states of disrepair.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

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

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

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

A promising candidate for the lost rock laid by George Washington was unearthed, but the hunt is still on.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

The walls of the iconic dome are hollow and have a secret stairway.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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

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

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Corn-inthian columns with a uniquely American take on neoclassical architecture.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.