Crystal Cave in Sequoia National Park, California: Inside the Crystal Cave with glittering stalactites.

The Wave, Arizona: The iconic wave-like sandstone formations.

Lost Sea, Sweetwater, Tennessee: The underground lake with a glowing blue hue.

Hamilton Pool Preserve, Texas: The waterfall and pool under a natural limestone grotto.

Painted Hills, Oregon: Multicolored hills in striking reds, yellows, and golds.

Blanchard Springs Caverns, Arkansas: Intricate cave formations lit with subtle lighting.

Apostle Islands Sea Caves, Wisconsin: Sea caves along a rugged shoreline with icy formations in winter.

Fly Geyser, Nevada: The colorful geothermal geyser spurting water.

Crystal Cave in Sequoia National Park, California: Inside the Crystal Cave with glittering stalactites.