This stunning and ethereal mural symbolizes the beauty, unity, and diversity of humankind.

It's believed this golden brick is part of the legendary lost Aztec treasure.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Murals made with millions of colorful stones adorn the abandoned building.

Inside a busy metro station, an impressive mural depicts the prehispanic city of Tenochtitlán.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

Diego Rivera's massive tiled fountain and failed infrastructure project.

An unusual assortment of steerable wooden sleds is on display in a library in New Jersey where they were first invented.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The world's longest known cave system.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.