A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

A museum, walk-through diorama, and library nestled under one castle-like roof.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

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

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

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

Where manatees are the snowbird vacationers in these balmy Florida springs.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Location of a reliquary containing bone fragments of 18 saints.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

A lion given to the prime minister somehow got stuffed and sent to Florida.