This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

A giant 400-acre preserve in North Florida for displaced wolves.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

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

Huge otherworldly domed rocks on the shore of a deadly lake.

A glittering South Asian anomaly in a wealthy Los Angeles suburb.

California's own majestic geyser is powered by a subterranean volcano.

Nuclear waste dump site now an environmental sanctuary.

What began with a single, 357-pound chunk of the Canyon Diablo meteorite grew to be an impressive collection. 

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

A Mysterious Masonic tomb in San Luis Obispo.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

The fossilized remains of ancient California redwoods.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

"Only the devil could play golf here."

A popular tourist cave with a dark past.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

One of the most unusual geological features, recognizable from a dozen hit movies.

An extensive collection of ancient Egyptian artifacts and mummies.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

An overlooked and unassuming engineering marvel.

These millipedes glow not out of attraction, but as a not-too-subtle warning.