Considered by many to be one of the most dangerous highways in Alaska.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The king of U.S. high points towers over every other peak on the continent.

This once rural mansion now sits in the heart of the city.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.

Launchpad for the US military’s dead mouse operation to battle millions of snakes.

The seat of the lost Ryukyu Kingdom has survived numerous fires and wars over the centuries.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

An adorably sweet display of sculpted Precious Moments figurines.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

This mill has survived a tumultuous past to still produce flour and cornmeal.