At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

The location where the iconic movie character declared it was time to go home.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This quiet park's strange sedimentary spires were named after Kodak's color film.

A small museum celebrating the fiberglass giants that are icons of America's highways.

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

Hundreds of graffiti artists have decorated this flood-wall on the west bank of the Mississippi River.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

There’s a hidden military meme engraved on the World War II Memorial.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

The world's largest collection of the world's largest objects is in one small Illinois town.

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

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.