The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

One of the smallest towns in the United States.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

The only arched bridge made of stone on the entire Mississippi River.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

When flour explodes, it's not a pretty sight.

The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

Mural fragments and various sculptures honor the longtime artist.

Once the smallest park in the national system.

Historical figures from New York City's Catholic community reside in Midtown.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Statue commemorating the use of ether in anesthesia.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

This historic Boston building has gone from personal estate to porn theater and back again.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.