The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This cheery fruit farmer welcomes visitors to a classic roadside emporium.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Bad farming practices caused this unnatural natural wonder.

A 131-year-old wunderkammer of Texas history.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

Built to replace a house destroyed by a hurricane, this home is made entirely of shipping containers.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A hot dog stand where the heads are just as hot as the dogs.

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

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A lion given to the prime minister somehow got stuffed and sent to Florida.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

These ruins are all that remain of what a Spanish barrack that likely housed a quarry overseer, masons, and stone cutters involved in the construction of the Castillo de San Marco.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

One of the oldest, tallest, and most haunted lighthouses in America.

St. Augustine's record-setting narrow street was designed to protect against pirates.