Mammoth Cave National Park is Kentucky's only national park, but it isn't the state's only cave open to the public.

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 National Park Service manages 433 units around the country, including many smaller parks aimed at preserving places of historical significance.

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.

Crystal Cave, located in Sequoia National Park, reopens to the public on May 23 after a four-year closure due to fire and weather damage. Visitors can purchase tickets for guided tours, with ...

After being closed for four years, one of Sequoia National Park’s most popular and jaw-dropping natural wonders is opening back up to the public. Before its closure, the cave was visited by an ...

After four years of closure, Crystal Cave is reopening this month in Sequoia National Park. Learn why it was closed, how to book a tour, and more.

Thursday, Sen. Mitch McConnell and Rep. Brett Guthrie introduced the "Mammoth Cave National Park Boundary Adjustment Act" in Congress.