The “Sistine Chapel” of the Middle Ages merges 11th-century science and religion in wondrous hues.

This ancient Hawaiian henge may have been an early star chart.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.

Chicago’s incendiary role in the labor movement.

The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

The relics of dozens of martyrs are stored in a single chapel.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

Colloquially known as "the lynching memorial," this is the United States' first memorial to the victims of racial terror at home.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

The legacies of two historic Black American institutions live on in this unassuming brick building.

Is this statue at Naumberg Cathedral the fairest of them all?

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

You must take the A train... to the last active cemetery in Manhattan.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."