This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

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

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

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

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

This ghost town was once a cult-like religious utopian settlement.

Largest collection of mounted dinosaur specimens in the world.

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

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Destructive children, start your engines.

America’s oldest community theater, this Boston club has been in operation since 1877.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

A unique museum dedicated to the Gullah-Geechee people, housed within an old oyster cannery.

This kitschy tavern is also home to rare early editions of "Treasure Island."

Hidden amid the old-world charm of Savannah is a museum dedicated to the world of oddities and criminal history.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.