This old residential building was once the largest flour mill in the world.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

A large instrument played by the wind.

A blast from the past in central San Diego.

Burial site of the notorious Chicago gangster.

The larger-than-life art installation at Tampa International Airport welcomes travelers to town.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

Nearly 200 prehistoric giants lurk among the trees at this theme park.

Nicknamed the 'Minnehaha Bunny,' this bronze sculpture is nine feet long and weighs 1,500 pounds.

The first declared National Monument in the United States.

Art Deco stylings conceal the true nature of this bridge.

This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

Now abandoned, the first reinforced concrete bridge in Alabama still stands over the Pea River.

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

America's first National Historic Landmark is a 100-foot tall obelisk and gravesite dedicated to the only casualty of the Lewis & Clark Expedition.

The hall of fame for circus performers.

A towering, steel behemoth that has graced the skyline of Lakeland, Florida since the early 1980s.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

These cliff and rock formations are made out of Sioux Quartzite.