Every autumn, this grove of living fossils erupts in a blaze of brilliant golden-yellow leaves and stinky fruit.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

A miniature world of concrete and stone in Springfield, Ohio.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

One of the world's earliest skyscrapers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Buy a token from the liquor store and you can make this beast spew flames on command.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The final resting place of the hero of Air Florida Flight 90 known as "the man in the water."

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

This historic lavatory leftover features two levels of defecation stations completely without context.

This small-town park in southern Illinois has a 1,000,000-gallon swimming pool and a 100,000-barrel oil well.

The world's largest collection of the world's largest objects is in one small Illinois town.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

Modeled after the labyrinth in Chartres Cathedral, this small-town Indiana memorial labyrinth sits half a world away.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.