A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

This cave holds a surprisingly colorful variety of geological oddities.

A bypass decorated with large wooden troll carvings.

Wisconsin's most celebrated export gets the royal treatment on I-94.

A place to eat for on-the-run agents and espionage enthusiasts.

The world's longest known cave system.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

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

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

The world's largest man-made underground caverns offer unparalleled underwater wonders.

I-95's Tijuana-style celebration of kitsch at the Carolina border.