Indeed, the caves represent just one of many attractions of this International Biosphere Reserve. Other natural wonders — including ridgetops, river views, sinkholes, overlooks, springs ...

The cave walk to the waterfall costs $28.95 ... For more information, visit the Ruby Falls website. Ocoee River Middle Whitewater Rafting Trip (Most Popular Tour) ...

The park also boasts the Fern Grotto, a lava-rock cave draped in ferns that ... Many travelers come to Wailua River State Park to see Wailua Falls, considered a top attraction in Kaua'i.

Underground rivers dissolve the limestone ... and tiny cracks up there are growing into more new cave! When water containing dissolved limestone falls to the floor of a cave some of the calcite ...

The Alle-Kiski Valley Historical Society archives contain old newspaper clippings that mention the cave near the top of the hill across the Allegheny River from Tarentum’s Corbet Street.