A young state senator's deathbed plea to be buried inside a rock resulted in this unusual grave site.

A sprawling museum located on the former site of the Orphan Girl Mine.

A museum dedicated to the history and art of staying clean.

A historic coal mine that doubles as a museum and tourist attraction.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The fifth-longest natural arch in the world, and the longest outside China.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A small, forgotten prison cemetery marked only by a wrought-iron fence and eerie depressions left in the ground.

This quirky local sculpture is quite literally a fish out of water.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.