Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Inside a lava tube in Craters of the Moon National Monument and Preserve in Idaho
Tourists on the stairway in the rocky mountains on the São Francisco River in Alagoas, Canindé, Sergipe, Brazil
On the first night of the March eruption the road to Grindavik was over run by lava
Thurston Lava Tube at Hawaii Volcanoes National Park
Old standing aqueduct pipes and tunnels underneath Woodbridge, NJ that date back to the early 1900's around the time of the townships original colonization are digitally enhanced using pinch and spherical tools to create a hole tunneling into the earth.
Thousands of Egyptian Fruit Bats or Egyptian Rousettes roost and fly in massive, tightly packed groups and in a cave in Queen Elizabeth National Park.
A view of the active volcanos with flowing lava in Hawaii Volcanoes National Park from a helicopter.
overhead view of collapsed mine big hole in land
Thurston Lava Tube at Hawaii Volcanoes National Park on Big Island, Hawaii..
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Le Piton de la Fournaise volcano, Reunion Island - France
Jomblang cave, Indonesia
Hawaii Volcanoes National Park
Castagnacupa, Umbria, Italia: Il fondo della Grotta del Chiocchio sul Pozzo dell'Anatra a meno 540 metri
Entrance of Kaumana Caves, a massive 1881 lava tube cave formed by Mauna Loa on the Island of Hawai'i.
Moss on the bark of a tree
Man silhouette in an underground abandoned crypt with burning red signal flare. Man squatting in front of a cave hole in complete darkness.
View from inside of Algar do Carvão cave, inside an extinct volcano,  in Terceira  island , Azores archipelago.
Hiker standing above dangerous deep volcanic hole cave in ground, guided tour hiking concept on Mount Etna, Sicily, Italy
Entrance to the  Cave Gýgagjá on the south-side of Hjörleifshöfði (Iceland).
mawsmai cave in Meghalaya.
Aerial view from a helicopter of a volcanic rock surrounding a small natural pool. The bright blue waters are rushing into the hole filling it with water.
Lava Beds National Monument
The Cavaglia Glacier Garden\nView of Giants pots in Cavaglia Glacier garden
Cave located near the El Maviri silver in Ahome Sinaloa, where millions of bats of the species Tadarida brasiliensis, better known as the guano bat, come out on summer afternoons to hunt insects from the region. Photo: Esteban David Saavedra Del Rayo (Mexico, 2023)
Daglı sinkhole, Kastamonu, Turkey
Dwarfed by a giant lava tube, a woman hiker explores along rough and sharp dried lava on top of the remaining tube on the Seven Bridges trail in the Big Tubes area of Malpai National Monument in New Mexico. Ten thousand years ago Bandera Crater was formed with fluid lava flowing through this collapsed vent tube.
lanzarote, Natural Park: volcanic crater with thick lava stream. Volcán del Cuervo, Geological heritage.
Lava Beds, California - March 13 2017: Volcanic caves in the high desert of northeast California
Thurston lava tube, Pahoa -Kea'au, Hawaii
Free Images: "bestof:A vertical entrance into a lava tube photographed from a helicopter. NPS Photo by Dale Pate lava nps tube cave"
Lava-Tube-Entrance-Mojave-National-Preserve.jpg
warm_springs_at_the_base_of_the_northernmost_lava_flow_from_Southwest_Trident_6_08182013_(1).jpg
It's_Just_a_Little_Heat,_That's_All.jpg
warm_springs_at_the_base_of_the_northernmost_lava_flow_from_Southwest_Trident_3_08182013.jpg
Breadcrust_bomb_near_Novarupta,_Valley_of_Ten_Thousand_Smokes,_Memorial_Day_Weekend_2010_079.jpg
thurston-lava-tube-lava-flow-599415.jpg
Thurston-Lava-Tube-at-Hawaii.jpg
Entering-Nahuku-Thurston-Lava-Tube.jpg
Hikers-Nahuku-Thurston-Lava-Tube.jpg
Oasis_of_Mara_Rainbow.jpg
Apgar_Picnic_Area_-_1_[Near_West_Entrance].jpg
Apgar_Picnic_Area_-_2_[Near_West_Entrance].jpg
Apgar_Picnic_Area_-_3_[Near_West_Entrance].jpg
Fish_Creek_Amphitheater_-_1_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_3_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_2_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_4_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_6_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_7_[Near_the_West_Entrance_to_the_park.].jpg
Fish_Creek_Amphitheater_-_5_[Near_the_West_Entrance_to_the_park.].jpg
Ryan_Beach-Meadow,_Lake_McDonald_-_5_[Near_the_West_Entrance_to_the_park.].jpg
Ryan_Beach-Meadow,_Lake_McDonald_-_2_[Near_the_West_Entrance_to_the_park.].jpg
Sign_at_Oasis_Visitor_Center,_Twentynine_Palms,_California.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
Middle_Fork_of_the_Flathead_River.jpg
Joshua_Tree_Visitor_Center;_Joshua_Tree_Village,_CA.jpg
2006_Installation_of_New_West_Entrance_Sign.jpg
Close_up_of_exposed_fumarole_pipes_on_the_hingeline_northwest_of_Mt._Cerberus_6_08042013.jpg
sandbar-water-ocean-sea-wave-869195.jpg
2006_Installation_of_New_West_Entrance_Sign.jpg
VibratingGlassBeam.jpg
exposed_fumarole_pipes_on_the_hingeline_northwest_of_Mt._Cerberus_1_08042013.jpg
On_the_"road"_to_Goat_Haunt.jpg
Megachile_latimanus,_left_side_2012-07-13-18.27.jpg
Lasioglossum_heterorhinum,_F,_Face,_UT,_Garfield_County_2014-05-09-17.50.19_ZS_PMax.jpg
Lasioglossum_michiganense,_F,_Side,_NY,_Queens_2014-04-22-14.59.53_ZS_PMax.jpg
Lasioglossum_michiganense,_F,_Face,_NY,_Queens_2014-04-22-14.45.01_ZS_PMax.jpg
Indian_Cove_Campground_Ranger_Station;_Twentynine_Palms,_CA.jpg
Indian_Cove_Campground_Ranger_Station;_Twentynine_Palms,_CA.jpg
Emergency_Phone_at_Indian_Cove_Campground;_Twentynine_Palms,_CA.jpg
Anthophora_montana,_M,_Back,_Larimer_Co,_CO_2013-12-11-11.07.30_ZS_PMax.jpg
Lasioglossum_albohirtum,_F,_Side,_WY,_Lincoln_County_2014-05-30-11.28.46_ZS_PMax.jpg
Lasioglossum_albohirtum,_F,_Back,_WY,_Lincoln_County_2014-05-30-11.02.49_ZS_PMax.jpg
Anthophora_montana,_M,_Side,_Larimer_Co,_CO_2013-12-11-11.39.01_ZS_PMax.jpg
Colorful-wall-of-Malostranska-underground-subway-station.jpg
Lasioglossum_albohirtum,_F,_Face,_WY,_Lincoln_County_2014-05-30-11.09.08_ZS_PMax.jpg
Lasioglossum_michiganense,_F,_Back,_NY,_Queens_2014-04-22-14.38.00_ZS_PMax.jpg
Karle_Criss_Special_Collection_Photo.jpg
Design_Analysis_of_the_P-38_Lightning.png
Design_Analysis_of_the_Lockheed_PV-1_Ventura.png
Victoria_Gate,_Kew_Gardens._Real_photo_postcard,_1912.jpg
Across_road_junction_at_Clapham_Common,_London,_England.jpg
Design_Analysis_of_the_B-24J_Liberator.png
Design_Analysis_of_the_Boeing_B-17G_Flying_Fortress.png
Lava_Tube.jpg
El_Malpais_National_Monument.jpg
Lava_Tube_at_El_Malpais_National_Monument.jpg
Bacteria_growing_within_water_drops_colors_the_walls_golden_in_Golden_Dome_Cave_in_Lava_Beds_National_Monument..jpg
Mammoth_Cave.jpg
Cave_Stream.jpg
Cave_Entrance_at_El_Malpais_National_Monument.jpg
Traversing_a_Pit.jpg
Rapelling.jpg
Nāhuku Silhouette.jpg
Nāhuku.jpg
Cave_Entrance.jpg
Bird_Banding.jpg
Crawling.jpg
HNVPThurstonLavaTube.jpg
Cave_Paleoclimatology.jpg
Climbing.jpg
A_cave_cricket_in_Mammoth_Cave_National_Park..jpg
Aragonite.jpg
Karst_Spring.jpg
Enjoying_the_View.jpg
A_small_colony_of_Townsend's_Big_Eared_bats_in_Lava_Beds_National_Monument..jpg
Caver.jpg
Fossils.jpg
Cave_Paleontology.jpg
Survey_and_Exploration.jpg
Crystal_Cave.jpg
A_solitary_roosting_bat_in_Mammoth_Cave_National_Park..jpg
lava_tube,_Hawaii.jpg
Thurston Lava Tube.jpg
Thurston Lava Tube Edit 1.jpg
Thurston Lava Tube Edit2.jpg
Spring_Flows_From_A_Cave.jpg
Cinder_Cones.jpg
Nēnē_with_lava_lake_in_background.jpg
Terms of Use   Search of the Day