This fully functional mailbox stands at a staggering 5,743.41 cubic feet and allows visitors to mail letters from inside its built-in stairway.
Modeled after Denmark and Spain, Solvang features Copenhagen-esque mermaid statues and Spanish-style architecture, making visitors feel like they're in Europe.
This national park boasts the world's largest gypsum dune field, covering 275 square miles with wave-like dunes of white gypsum salt.
Built entirely of corn and corn husks, the Corn Palace in Mitchell celebrates the state's main crop and draws over 500,000 visitors annually.
The pastel-colored, picturesque town of Seaside served as the main filming location for the movie "The Truman Show," offering visitors a nostalgic.
Ruby Falls, Tennessee - America's Tallest Underground Waterfall:
Located within Lookout Mountain near Chattanooga, Ruby Falls plunges 260 feet underground, surrounded by ancient cave formations and a cavern trail.
Bishop Castle, Rye, Colorado:
Constructed by Jim Bishop, this castle in central Colorado features unique elements like stained glass windows, wrought-iron bridges, and even a steel, fire-breathing dragon.
Fly Geyser, Nevada:
Accidentally created in 1964, Fly Geyser is a marvel of vibrant colors due to mineral deposits like algae, iron, and sulfur. Although on private property, tours are available to witness its spectacle.
Wild Horses in Assateague Island:
Straddling Maryland and Virginia, Assateague Island is famous for its wild horse population and serves as a sanctuary for diverse wildlife.