In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

The 400-year-old remains of the samurai invasion of Korea.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

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

An enormous factory from the late 1800s sits abandoned on Cleveland eastside.

A dazzling display of lights and crystals.

On a wall in Cleveland, Ohio find the story of a highly connected fictional community of organisms that created remarkable, lasting structures.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Old car parts and assorted materials get turned into one man's mechanical treasures on the side streets of Cleveland.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

A sharply wedged sundial marks the point at which each day in the United States begins.

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

The same security that protects our nukes accidentally protected a gentle herd of antelope.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

A small Wyoming town is home to the state's oldest-operating soda fountain.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.

In September 1974, a small group of athletes completed the first modern triathlon event in San Diego's Mission Bay.

A hidden courtyard houses early 20th-century plaster masterpieces.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This more than a century-old cathedral has seen its fair share of redesigns over the years.