A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This ancient Egyptian obelisk still bears the wounds of World War I.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of only two commuter aerial tramways in the United States.

A crumbling hospital from the 1850s on Roosevelt Island.

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

A small town museum honors local WWII veterans and the queen of pop who put it on the map.

These massive mitts are made of 30 tons of devotional bronze.

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

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

Nature's biggest mammal swims in landlocked Oklahoma.

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

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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

A fitting attraction for the corn capital of the world.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

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

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

A home designed to be on the cutting edge of comfortable, low-cost living.

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