While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The "lovely red Vega" of the legendary record-settling pilot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Home to items never before seen by the public.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

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

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

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A long-vacant Scottish Rite temple in Hollywood has been converted into an art museum filled with Masonic relics.

This house turned museum chronicles the life and work of Richard Neutra.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Electrical pylon in the shape of Disney's beloved mouse.

A building so large that it has its own weather.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

This abandoned Abraham Lincoln statue has also earned the honorary of "World's Ugliest."

A European-style bath house in Chicago.

The sign to a demolished amusement park now stands in front of a local library.

A long lost multi-cultural music venue used to reside in the bottom floor of Chicago's Flat Iron Building.

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

Huge abstract sculptures of the Puerto Rican Flag.