Sistema Sac Actun (Mexico) – Located in the Yucatán Peninsula, it's one of the world’s longest underground rivers, connected to ancient Mayan cenotes. Lost River (USA – Indiana) – This river vanishes ...

Southwest Texas is the location of some pretty amazing parks, and I had the opportunity to visit two of them: Carlsbad Caverns National Park in New Mexico and Guadalupe Mountains National Park in ...

Tucked between the blue-hazed peaks of the Shenandoah Valley waits a town where dogwoods bloom above centuries-old sidewalks, ...

This unassuming town serves as the gateway to one of the Midwest’s most spectacular natural phenomena – McCormick’s Creek State Park, Indiana’s very first state park established in 1916, when having a ...

We're getting a look at Kartchner Caverns State Park in southeastern Arizona. The park is renowned for its extensive ...

Hop on a ferry to Nanaimo and prepare to hit the road for a mini road trip to Little Huson Caves Regional Park.

Mineral deposits in limestone caves in Saudi Arabia show that the now arid Saharo-Arabian Desert experienced increased ...

Isotope analyses of limestone cave deposits reveal recurrent humid intervals in the Saharo-Arabian Desert over the last eight ...

As historic storms drenched parts of Kentucky over the weekend, Mammoth Cave National Park saw floodwaters rise throughout ...