Buttertubs potholes, karstic erosion at Buttertubs Pass, between Wensleydale and Swaledale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Buttertubs potholes, karstic erosion at Buttertubs Pass, between Wensleydale and Swaledale, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Limestone plateau, karstic landscape, Burren region, County Clare, Munster, Republic of Ireland, Europe

Limestone plateau at sunset, karstic landscape, Burren region, County Clare, Munster, Republic of Ireland, Europe

El Tornillo rock formation. El Torcal de Antequera, Sierra del Torcal, Antequera, M�laga, Andalusia, Spain. Karstic rock formations

Blaubeuren Abbey and the mill being reflected on the Blautopf karstic spring, Swabian Alps, Baden-Wuerttemberg, Germany, Europe

Scenic view of the volcanic rock cliffs and shoreline at Cala del Bue Marino on Pantelleria Island on a sunny day, Pantelleria Island, Trapani, Sicily, Italy

Coastal view of the Mediterranean Sea and rocky shore along the rugged cliffs of Pantelleria Island, Sicily, Italy

Close-up view of the volcanic rock cliffs and shoreline at Cala del Bue Marino on Pantelleria Island on a sunny day, Pantelleria Island, Trapani, Sicily, Italy

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Landscape of tropical karstic phenomena in the Tsingy national park of Bemaraha, Small Tsingy area, UNESCO World Heritage site, Early November: end of dry season, Madagascar

Mid-air-mid-water view of the Burles spring, karstic exsurgence of Vauclusian type, on the commune of sainte-Enimie, Lozere, Occitania, France.

Tek (Trimix) speleologist diver in a karstic underwater cave over 70 meters deep, Photogrammetry, twiglight zone, Mayotte

Cave diver in an underwater cave of karstic origin at a depth of 75 meters during the Gumbo La Baharini 2 expedition, which aimed to produce a complete 3D model of this karstic cave using photogrammetry. Passe Bateau Sud, Mayotte lagoon

Potholing diver in a karstic cave at Passe Bateau Sud, 60 metres deep in Mayotte's lagoon.

Tek rebreather diver at a depth of 70 meters with a DPV specially equipped with 60,000 lumen lighting and 12 Gopro to carry out a 3D survey of a karstic cave submerged for over 14,000 years, Passe Bateau Sud, Mayotte Lagoon

Speleologist diver taking photographs in a karstic cave at Passe Bateau Sud at a depth of 60 metres, Mayotte