Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

The first declared National Monument in the United States.

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

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

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Concrete strongholds stand guard over the Golden Gate.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

Dig for your own trilobites in this goldmine of invertebrates.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This little gem of a museum is a hidden jewel filled with prehistoric treasures.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The oldest continuously occupied public building in the United States.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.