A monument celebrating the idea of reaching inaccessible places.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

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

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This abandoned prison castle has become an imposing gallery of graffiti art.

The world-record holder for the longest bridge stretching continuously over water.

One of America's first planned communities is preserved in a state park.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

This otherworldly church spire reaches up toward the heavens.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

Community bookshelf of 25-foot-tall book spines.

Home to Hollywood history and a very special salt crystal.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This kitsch eatery is chock-a-block with bric-a-brac.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

An adorably sweet display of sculpted Precious Moments figurines.

Tribute to the famous Notre Dame football coach who died in a plane crash.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.