Red Tape Cave

National Park del Teide, lava field landscape of Minas de San Jose

Glen Coe scenery, The Highlands

Merapi Volcano park with large canyon, Java, Indonesia

Parque Nacional Del Teide, panorama from a lava field near Roque de Garcia, Tenerife

Roque de los Muchachos Mirador with Cumbre Vieja Volcano Eruption, La Palma

Harry Annex Cave (interior)[1]

Guamaso mountain in Tenerife National Park of Canary islands

Grábrók Crater, Iceland

Grábrók Crater, Iceland

Pumice stockpile (aerial)

Sunrise and Mist at the Bromo Mountain in Indonesia

National Park Del Teide, Roques de Garcia on Tenerife

El Teide Peak Hiking Trail overlooking the impressive landscape of Tenerife

Sendero Roques de Garcia, Beautiful hike on Tenerife

Lyons Peak (7900'/2408m) summit

Red Shale Butte (7820'/2384m) summit (aerial)

Church tower in ruins of Hohentwiel fortress

Ronciglione Borgo Di Sopra

Inside Christmas Tree In Ronciglione

aerial panorama over the center of an extinct volcano in the Western Caucasus - in the center of the fortress ridge depression near the Afips River

Mount Agung in East Java, Indonesia

Roque Nublo Viewpoint - Gran Canaria

Dukes castle ruins inside Hohentwiel fortress.