Alexander Hamilton’s creation caused quite a bit of controversy.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Step into a pastel time capsule where candy is truly dandy.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

One of Philadelphia's largest murals resides hidden under this bridge.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

The Lowcountry color with the power to stop evil from entering a home.

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

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

A brass and marble scale model of the solar system embedded in the concrete.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

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

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

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

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

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

The first American department store, and home to the largest operating musical instrument in the world.

This elaborate towering structure was once famed for its revolutionary height.