Caves
The hollow places. Limestone and karst, stalactites and stalagmites, lava tubes and ice caves, crystal chambers, the biggest caverns yet found, and how a cave is surveyed and mapped.
Part of Underground
51 moments in this segment.
- - 14 644 Grotta di Nettuno, Höhlensee. Kurz nach dem Eingang, der Höhlensee ist mit dem Meer verbunden. Von rechts fällt durch den Höhleneingang Tageslicht ein.
- - Aven Armand 6. Aven Armand cave. Pictures were taken without flash, and the lighting is the one which can be seen today by any visitor. The first picture features the grande stalagmite, the highest known stalagmite.
- - Mammoth Cave Nat Park banner. "Stalactites and stalagmites inside Mammoth Cave, formed by dripping water.".
- - The Dikteon Cave, Crete. The Dikteon Cave on Crete, a limestone cave used as a cult site from the Minoan period and known in Greek myth as a birthplace of Zeus.
- - Ancient cave - home in Horvat Anim. Surrounding the synagogue there was a village comprised of caves used as homes in the 3-4 C CE. Modern photograph of an ancient site.
- - Cave in Rugova Mountain. Great Cave in Rugova Gorge is a rare beauty of the underground terrains in Kosovo. It is estimated that this cave is one of the most attractive natural objects for the conduction of research and touri.
- - A geoscientist intern at Mammoth Cave. A National Park Service photograph of a Geoscientists-in-the-Parks intern at Mammoth Cave National Park, Kentucky, the longest known cave system in the world.
- - Balve-Reckenhoehle 10. Balve, Reckenhöhle, Detail der Kalksteinformationen, Stalaktiten, Münzen von Besuchern hinterlassen.
- - Cave interior: Natural cave habitat. A public-domain photograph of a cave interior showing natural cave habitat.
- - Cave interior: Waterway with arched ceiling and flowing water in channel. A public-domain photograph of a cave interior showing waterway with arched ceiling and flowing water in channel.
- - Cave interior: Flowing water with low ceiling and many small stalactites. A public-domain photograph of a cave interior showing flowing water with low ceiling and many small stalactites.
- - The science of sinkholes. USGS geologist Randall Orndorff on how dissolution of soluble rock creates the voids that later collapse into sinkholes.
- - Tesoro 2014-04-17 17-12-14. Cueva del Tesoro Karst en Yeso de Sorbas Sorbas (Almería).
- - Tesoro 2014-04-17 17-09-14. Cueva del Tesoro Karst en Yeso de Sorbas Sorbas (Almería).
- - Konglomerathöhle Rohrendorf PLDC0113. This media shows the natural monument in Lower Austria with the ID KR-069.
- - Mexico's giant crystal cave explained. How the chemistry of the Naica cave produced the world's largest crystals in an environment survivable only for minutes.
- - Disappearing ground: karst, sinkholes and caves. Museum lecture by Arkansas master naturalist Denis Dean on the karst underground of the Ozarks, recorded January 2015.
- - 2015 Jaskinia Niedźwiedzia w Kletnie, szata naciekowa 04. This is a photograph of a Natura 2000 protected area with ID.
- - Ask a geologist: what is karst?. Illinois State Geological Survey geologist Sam Panno on karst terrain, sinkholes and cave development.
- - Castellana's caves wolf. Castellana's caves are some of the longest and biggest caves in Puglia. Their length is about 3400 metres and only 1500 metres are available to tourists. Castellana's caves are rich in concretions suc.
- - Exploring Iceland's lava tubes. Natural History Museum scientists use Icelandic lava tubes as analogues for volcanic terrain on Mars.
- - Vermiculations on cave passage ceiling (Skyline Caverns, Front Royal, Virginia, USA). Vermiculations on a cave passage ceiling in Virginia, USA. Vermiculations are relatively small, worm-like structures composed of fine-grained sediments that occur on some cave ceilings and walls. Thes.
- - Spongy chert mass (Skyline Caverns, Front Royal, Virginia, USA) 1. Chert mass in a cave in Virginia, USA. Skyline Caverns is developed in structurally tilted carbonates (mixed dolostones and limestones) of the Rockdale Run Formation (Beekmantown Group, Lower Ordovici.
- - MACA-RainbowDome (cbe5553b-1dd8-b71b-0b44-354eda72e28a). MACA-RainbowDome Keywords: nps centennial; maca.
- - Stalagmites record a cave's shaky history. Splitting stalagmites open reveals a layered record of ancient earthquakes and shifts in cave climate.
- - Buniayu Cave 09. a guide waited while a visitor walked below the natural canopy made of a group of stalactites in Buniayu Cave, West Java, Indonesia.
- - How sinkholes form. An engineering account of internal erosion, the subsurface process behind both natural and human-triggered sinkholes.
- - Sinkholes: collapsing houses and dissolving rock. Geological Society London Lecture on how limestone, gypsum and salt dissolve at very different rates, and what that means for surface collapse.
- - Bringing caves and karst to light. An education programme on cave ecology, geology, hydrology and conservation, and how the karst underground connects to life on the surface.
- - How do caves form?. An explainer on the dissolution of limestone, karst drainage and the growth of the cave systems that result.
- - Lava tubes beneath the surface of the Moon. NASA on the network of lunar lava tubes, shielded from solar radiation, that may preserve the record of ancient volcanism.
- - Vue du porche de la grotte Vallier sur Grenoble. La cuvette grenobloise se détache depuis la grotte Vallier.
- - Breast like Stalactites. It is called "Soso Cave" because of its breast like formations of stalactites. Located at the Municipality of Matuguinao "The Heart of Samar", Western Samar.
- - An introduction to sinkholes and karst research. The National Cave and Karst Research Institute outlines sinkhole formation and the cave and karst studies it carries out.
- - 20211117.Gibraltar-St. Michael’s Cave.-011. St. Michael’s Cave oder Old St. Michael’s Cave ist der Name eines Kalksteinhöhleensystems im Upper Rock Nature Reserve im britischen Überseegebiet Gibraltar, auf einer Höhe von 300 Metern über dem Mee.
- - 20211117.Gibraltar-St. Michael’s Cave.-012. St. Michael’s Cave oder Old St. Michael’s Cave ist der Name eines Kalksteinhöhleensystems im Upper Rock Nature Reserve im britischen Überseegebiet Gibraltar, auf einer Höhe von 300 Metern über dem Mee.
- - Inside the Pulpi geode, the world's largest crystal cave. The Pulpi geode, found in 1999 inside an abandoned mine in southern Spain, and how crystals grow inside a geode.
- - Amethyst Geode from Brazil. A geode of amethyst from Brazil. Height: 245cm, Width: 140cm, Weight: 2.5t. It was exhibited at the special exhibition "Gems" held at the National Museum of Nature and Science, Tokyo in 2022.
- - Cave Science- Insights from the Indian Subcontinent. The first Text cum Research Reference book on "Cave Science" from India.
- - The Undara lava tubes of Queensland. Undara Volcanic National Park holds one of the most extensive lava flow systems produced by a single eruption anywhere on Earth.
- - Kazumura Cave, the world's longest lava tube. The Hawaiian lava tube beneath Kilauea runs about 65 kilometres, formed by a single voluminous eruption.
- - France's Cosquer cave: 20,000 years under the sea. The only submerged painted cave known, 37 metres down near Marseille, with horses, bison, ibex and penguins on its walls.
- - The mystery of the giant crystals. Feature documentary following the research into how the giant gypsum crystals beneath the Mexican desert formed.
- - Why NASA is interested in an upside-down cave. Lechuguilla and Carlsbad, dissolved upward by sulphuric acid beneath the Chihuahuan Desert, host microbes that interest astrobiologists.
- - Lava Tubes of Jeju - JejuLavaTubes2471. Interior of a lava tube cave, with a sign marking the '2nd Dragon's Door' formation and a wooden walkway for visitors.
- - The geology of Carlsbad Caverns. How the Permian reef of the Guadalupe Mountains became the Carlsbad cave system, and how speleothems form inside it.
- - Mammoth Cave: a way to wonder. Hour-long PBS documentary on Mammoth Cave National Park, the world's longest known cave system, from prehistoric Native American use onward.
- - The history of the Mammoth Cave guides. On the enslaved Black cave guides who mapped much of Mammoth Cave's 400 known miles and made it one of America's earliest tourist attractions.
- - The science behind giant sinkholes. BBC World Service on why the ground collapses without warning, and how karst dissolution sets the stage decades in advance.
- - Calthemite formation on a wall at Most Holy Trinity Cemetery, Brooklyn, New York, US
- - Inside the mystery of Earth's giant crystals. Documentary tracing giant gypsum crystals from Roman mines to Europe's largest geode at Almeria and the Naica cave in Mexico.