A natural arch, natural bridge, or rock arch is a natural landform where an arch has formed with an opening underneath. Natural arches commonly form where inland cliffs, coastal cliffs, fins or stacks are subject to erosion from the sea, rivers or weathering.
Blanchard Springs Caverns is a cave system located in the Ozark–St. Francis National Forest in Stone County in northern Arkansas, USA, 2 miles (3.2 km) off Highway 14 a short distance north of Mountain View. It is the only tourist cave owned by the United States Forest Service and the only one owned by the federal government outside the National Park System. Blanchard Springs Caverns is a three-level cave system, all of which can be viewed on guided tours.
Waitomo is a rural community in the King Country region of New Zealand's North Island. There are several solutional cave systems in the area around the village, which are popular tourist attractions. Restaurants and accommodation are centred in the village to serve visiting tourists.
The Heaphy Track is a popular tramping and mountain biking track in the north west of the South Island of New Zealand. It is located within the Kahurangi National Park and classified as one of New Zealand's ten Great Walks by the Department of Conservation. Named after Charles Heaphy, the track is 78.4 kilometres (48.7 mi) long and is usually walked in four or five days. The track is open for shared use with mountain bikers in the winter season from 1 May to 30 September each year. The southern end of the track is at Kōhaihai, north of Karamea on the northern West Coast, and the northern end is in the upper valley of the Aorere River, Golden Bay.
Waitomo District is a territorial authority, located in the Waikato region, at the north of the King Country area in the North Island of New Zealand. A small part of the district, the locality of Tiroa, however, lies in the Manawatū-Whanganui region.
Cuilcagh is a mountain on the border between County Fermanagh and County Cavan. With a height of 666 metres (2,185 ft) it is the highest point in both counties. It is also the 170th highest peak on the island of Ireland, and Ireland's only cross-border county top. Water from the southern slope flows underground until it emerges some miles away in the Shannon Pot, the traditional source of the River Shannon. The area is sometimes referred to as the Cuilcagh Mountains.
The Jeita Grotto is a system of two separate, but interconnected, karstic limestone caves spanning an overall length of nearly 9 kilometres (5.6 mi). The caves are situated in the Nahr al-Kalb valley within the locality of Jeita, 18 kilometres (11 mi) north of the Lebanese capital Beirut. Though inhabited in prehistoric times, the lower cave was not rediscovered until 1836 by Reverend William Thomson; it can only be visited by boat since it channels an underground river that provides fresh drinking water to more than a million Lebanese.
Carboniferous Limestone is a collective term for the succession of limestones occurring widely throughout Great Britain and Ireland that were deposited during the Dinantian Epoch of the Carboniferous Period. These rocks formed between 363 and 325 million years ago. Within England and Wales, the entire limestone succession, which includes subordinate mudstones and some thin sandstones, is known as the Carboniferous Limestone Supergroup.
The Marble Arch Caves are a series of natural limestone caves located near the village of Florencecourt in County Fermanagh, Northern Ireland. The caves are named after the nearby Marble Arch, a natural limestone arch at the upstream end of Cladagh Glen under which the Cladagh River flows. The caves are formed from three rivers draining off the northern slopes of Cuilcagh mountain, which combine underground to form the Cladagh. On the surface, the river emerges from the largest karst resurgence in Ireland, and one of the largest in the United Kingdom. At 11.5 kilometres (7.1 mi) the Marble Arch Caves form the longest known cave system in Northern Ireland, and the karst is considered to be among the finest in the British Isles.
The Oparara Basin Arches are a number of natural limestone tunnels formed by the Oparara River, in the Oparara Basin, New Zealand. The two most famous ones are the 'Oparara Arch', large enough for a multi-storey house, and the 'Moria Gate Arch', which is smaller in height.
The Waitomo Glowworm Caves attraction is a cave at Waitomo on the North Island of New Zealand. It is known for its population of Arachnocampa luminosa, a glowworm species found exclusively in New Zealand. This cave is part of the waitomo streamway system that includes the Ruakuri Cave, Lucky Strike, and Tumutumu Cave.
Gardner's Gut is an extensive cave system in the Waitomo area of New Zealand. It is located in the Ruakuri Caves & Bush Scenic Reserve, an area that also contains a number of other natural features of note. The reserve is administered by New Zealand's Department of Conservation (DOC). With a length of over 12 km of explored passages, it is New Zealand's 6th largest known cave system, and the largest in the North Island.
Caving in New Zealand is an established hobby as well as being a part of commercial tourism.
The Cuilcagh Lakelands Geopark formerly known as the Marble Arch Caves Global Geopark straddles the border between Northern Ireland and the Republic of Ireland. It is centred on the Marble Arch Caves and in 2001 it became one of the first geoparks to be designated in Europe.
The Ōpārara Basin is a basin drained by the Ōpārara River at 20 kilometres (12 mi) north of Karamea, at the West Coast Region of the South Island of New Zealand. With its large natural rock arches, a network of caves rich in fossils, and a beautiful, unspoiled natural environment typical of temperate rainforests, it is one of the most striking places of the Kahurangi National Park.
The Metro / Te Ananui Caves are a maze of limestone caves formed by the underground capture of Ananui Creek, a tributary of the Waitakere / Nile River. The caves are located in the Paparoa National Park in New Zealand, managed by the Department of Conservation. Parts of the cave system are accessible by cave tours and rafting, operated by a commercial tour operator out of Charleston.
The Green Bridge of Wales is a natural arch formed from Carboniferous Limestone within the Pembrokeshire Coast National Park, Pembrokeshire, Wales. It is located in the Castlemartin military training area just beyond the car park at Stack Rocks and beside the Pembrokeshire Coast Path.
Rawhiti Cave, also known as Manson Cave, is a single large limestone cave in the hillside of the Dry Creek Valley 7 kilometres (4.3 mi) southeast of Tākaka on the South Island of New Zealand. It is referred to as Manson Cave in the NZ Topo Map, after owners in the early 20th century, however the cave is known as Rawhiti Cave locally, and on DoC information panels and in brochures.
Waikawau is a rural community in the Waitomo District and Waikato region of New Zealand's North Island, beside Waikawau River.
