This cave absolutely blew us away. In this video, we explore what might be the largest river cave we've ever encountered – a ...

What started as a simple exploration down an old underground pipe turned into one of our most unforgettable discoveries. In ...

Kayaking through underground river caves is an adventure like no other for the thrill-seekers. The combination of exploring ...

Local porters ferry the expedition team’s equipment across an underground river to reach various chambers within the cave system. Author Neil Shea squeezes through a passage to enter a ...

To enjoy the caves safely and comfortably, wear shoes with nonskid soles and take a jacket. Complete your underground trips with a river trip or a walk on the River Styx Spring Trail. The least ...

Jason Shoaf secured $1.2 million in the House budget proposal to use underwater drones to map Wakulla Springs and its connecting underground river. The project aims to create a 3D map of the cave ...

The underground river, the Meramec River, just adds to the cave's allure and is a drawing point for visitors. Some of the highlights of the Onondaga Cave tour include: King's Canopy: a massive ...

is an underground river and collection of caves. The bright turquoise water contrasts with the caramel- and mocha-colored rock formations within the caves, which include stalactites and stalagmites.

Škocjan Caves, the first Slovenian ... is considered the largest underground canyon in Europe. Inside it flows the Reka, the largest Slovenian sinking river. Considered the birthplace of modern ...