A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Illegal drag racing two stories beneath Chicago’s streets.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This historic fort spans more the 300 years.

A preserved trolley track that was transformed into a museum of transportation.

More than 200 unconventional musical instruments that anyone can play.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Wander the sprawling living museum on the site of one of a 16th-century community.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

As state highpoints go, this spot is one of the lowest, but for years it was also the hardest to climb.

This roadside wonder is as mysterious as it is beloved.

Walk in the footsteps of the gods and straddle two tectonic plates.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This rustic old building is said to be the most photographed barn in America.

A spiritual vortex among the red rocks in Sedona.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.