A boulder blocking a Mexican cave was moved. Hidden inside were human skeletons and the remains of sharks and blood-sucking bats.

Boulder Cave has reopened for the season, but those wanting to visit this popular natural attraction in western Yakima County will need to make a reservation.

One family found a new species the size of a sesame seed in Boulder, making it the only place in the world where the species is known to live.

A popular cave near Chinook Pass in Central Washington will be closed for part of the tourist season to help prevent the spread of the deadly white-nose syndrome in bats.

CLIFFDELL, Wash. (AP) At Boulder Cave, curiosity has all but killed the bat. In the cave chambers once used for winter hibernation by more than 2,000 bats, there are now mere dozens. And with a ...

Staffers from Boulder’s Open Space and Mountain Parks department — with the help of a burly AmeriCorps crew — are working to install a gate at the mouth of Mallory Cave that’s adorned with ...

What: Boulder Cave is the perfect Halloween weekend getaway. Not only does the cave draw hikers, but it also is popular with bats. In fact, it draws so many bats - about 65 each winter - that the ...

Boulder Foils Plan to Explore Underwater Cave A photograph of the Blue Hole, in Santa Rosa, N.M., at night in mid-September, 2013. Efforts to explore the lake's cave have been thwarted by a ...

Visitors headed to Boulder Cave will need to make reservations in advance this year as part of an effort to reduce congestion, wait times and parking difficulties.