Known as the "Hobbit Houses," these storybook homes look like they're straight out of the Shire.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

This weird abode has inspired everything from the "House on Haunted Hill" to a robot hunter's pad.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

A castle that was built stone by stone by an eccentric journalist.

In the middle of a remote desert town is a surprisingly opulent hotel.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

"The greatest unknown literary treasure in Los Angeles."

Gorgeous purple flowers drape from the world's largest blossoming plant.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

This enormous World War II relic is one of the largest wooden structures in the world.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

The current Eureka County Courthouse replaced an all-wooden structure that had previously been an ice-skating rink.

The world's largest dead polar bear, immortalized by taxidermy and Hunter S. Thompson.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.