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

Less a museum than a bizarre fantasy world created by artists and engineers.

A commemoration of over 150 of St. Louis's favorite sons and daughters.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

This is not your typical jungle gym.

A wooden rollercoaster that still delivers a thrill.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

This slender three-story building has also had several famous residents.

Commemorating the spot where the famous scientist fed his pigeons.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

One of only two commuter aerial tramways in the United States.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Every president in history is immortalized in bronze in downtown Rapid City.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

Comprised of Spanish war cannons, this sculpture once graced the bow of a WWI warship.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

The arboretum whose marshy soil sucked up the dreams of housing developers.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

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

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.