The cave’s named for an underground lake — really more like a large pool — of clear, cool water. Our tour took about 40 minutes. The year-round air temperature is 52 degrees. Bring a jacket.

Crystal Cave in Sequoia National Park, California, reopens for the season, offering guided tours and a magical underground experience after a 4-year closure.

People over the age of 12 can tour Crystal Cave for $20, while ages 4 to 11 can enter for $15. Mini golf and gemstone panning cost an additional $6 and $8, respectively.

Crystal Cave in Sequoia National Park, California, reopens for the season, offering guided tours and a magical underground experience after a 4-year closure.

Crystal Cave in Sequoia National Park, California, reopens for the season, offering guided tours and a magical underground experience after a 4-year closure.

One of the most interesting caves in Utah is Crystal Ball Cave, located in Gandy, Utah, and is one of Utah's most underrated gems. Discovered in 1956 by George Simms while searching for a lost ...

After a four-year closure due to natural disasters, Crystal Cave in Sequoia National Park reopened to the public in time for Memorial Day, the unofficial start of the summer.

The water, typically cool and crystal clear, contained some sediment due to recent storms. “It’s purified and safe to drink,” said Koppus, although it doesn’t taste too good.

Crystal Cave hours of operation will be Thursday through Sunday, with hourly tours from 10 a.m. to 4 p.m. Visitors can purchase tickets online at www.recreation.gov.

The cave is a development effort for businessman Tom Kerr, 56, who lives in a home on top of the underground chamber. Kerr sees his Crystal City Underground project as one day being a cultural ...