In the Shawnee National Forest, amazing rock formations peer through the treeline.

This family driveway also serves as the highest point in Illinois.

This tiny historic jail along Route 66 is the perfect fit for exactly one criminal and their partner-in-crime.

Man-made geyser that rises to the exact height of the Gateway Arch.

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

A river with some unusual, and occasionally dangerous, habits.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

A notorious Route 66 eatery once frequented by Al Capone.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Once America's tallest structure, now a Baltimore landmark.

The whole world in one water tank.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.