From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

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

This restaurant serves wood-fired fare served in a natural cave with a live spring.

The Quapaw tribe supplies the meat and produce in this Oklahoma casino restaurant.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

This extensive collection covers thousands of years of Polish military history.

Relive a Polish uprising via an enormous, century-old cyclorama.

The silly symbol for an underground protest group is now scattered around the city.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Seven dragon statues—including one that breathes real fire—are scattered throughout the streets of Krakow.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Remnants from a time before electricity.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

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

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

An adorably sweet display of sculpted Precious Moments figurines.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

A mysterious light of unknown origin on the backroads of Missouri.

An underground city of salt.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.