This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

An architect's childhood fantasy treehouse made real.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Along a California highway is a kind of Jurassic Park made of metal.

The site of Paul Revere's historic two lantern warning.

This super steep hike ascends 2,000 feet in less than a mile.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The walls of the iconic dome are hollow and have a secret stairway.

Come for the speed, leave in love with the desert.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

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

The highest point in Washington state is a volcano covered in glaciers.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

One of the most unusual geological features, recognizable from a dozen hit movies.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The drama of nature in full effect in this Nevada State Park.

This replica of the Greek structure is in the heart of Nashville.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.