With its iconic mountains, rivers, and coastline ... The two are linked as some of the best caves are, in fact, a lava tube, which is a natural tunnel formed by flowing lava moving underneath ...

A few of Gunung Mulu’s caves contain large rivers, which swell into wild torrents during heavy rains. Deer Cave is home to several species of bats, which usually fly out in the evenings to hunt.

Among the cave-centric park units within the National Park System, Mammoth Cave National Park in Kentucky stands out. Not ...

Approximately 700,000 years ago when molten rock erupted from a vent in nearby Hart Prairie, the mile-long Lava River Cave was formed. Today, visitors can explore the cave's cool, dark expanse by ...