Hundreds of 19th-century characters descend upon an Ohio town every autumn.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

At this unusual park, domes, ladders, chairs, and more are made from trees.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A big museum full of little worlds.

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.

A Saint Nicholas-themed ghost town in the Mojave desert.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

See massive fossils that are over 200 million years old in northeastern Arizona.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

This abandoned horse racing track was an exercise in hubris from its inception.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

The collection of signage remembers the midcentury pushback against the new neon light.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

A deserted hodgepodge of experimental structures designed by nearby university students.

The only Frank Lloyd Wright-designed structure in the architect's hometown.

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

A one-of-a-kind collection of a unique medium.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.