 view gallery |   Niguel Road Tunnel - Laguna Niguel, CA
in Cave Entrances (Artificial) A small hiking tunnel that goes under Niguel Road in Laguna Niguel, California. posted by:  bluesnote location: California date approved: 5/29/2021 last visited: 5/29/2021 |
 view gallery | Quarkloch - Helmbrechts, BY, Deutschland in Cave Entrances (Artificial) Das Quarkloch bei Helmbrechts posted by: *Team Krombaer* location: Bayern, Germany date approved: 5/29/2021 last visited: never |
 view gallery | Bierkeller Weielen - Gelterkinden, BL, Switzerland in Cave Entrances (Artificial) This former ice storage cave was dug around 1850, filled up in the early 1940s and recreated in 2014. posted by: fi67 location: Basel Landschaft, Switzerland date approved: 4/29/2021 last visited: never |
 view gallery | Smithwick Mine - Isle Royale, MI in Cave Entrances (Artificial) This location is the opening to a copper mine on Isle Royal island in Lake Superior. posted by: m&m O location: Michigan date approved: 4/2/2021 last visited: never |
 view gallery | Childhood's Gate cave - University Park, PA in Cave Entrances (Artificial) A limestone "cave" is a part of the Children's garden in the Penn State Arboretum. posted by: r.e.s.t.seekers location: Pennsylvania date approved: 4/2/2021 last visited: 4/3/2021 |
 view gallery | Chiquita Canyon Tunnel - Rancho Mission Viejo, CA in Cave Entrances (Artificial) A large tunnel that goes under Chiquita Canyon Road in Rancho Mission Viejo, California. posted by: bluesnote location: California date approved: 2/20/2021 last visited: 2/20/2021 |
 view gallery | Pennington Mine - Wichita Wildlife Refuge, Oklahoma in Cave Entrances (Artificial) A horizontal mine shaft drilled into the mountainside; in the Wichita Wildlife Refuge, Oklahoma. posted by: The Snowdog location: Oklahoma date approved: 11/29/2020 last visited: never |
 view gallery | Our Lady of Lourdes Grotto at Oblate School of Theology - San Antonio, TX in Cave Entrances (Artificial) This man-made grotto is reputed to be an exact dimensional replica of the cave entrance in Lourdes, France where a young woman saw apparitions of Mary, the Blessed Mother of God, as many as 18 times. Verified by experts from Lourdes, France. posted by: WayBetterFinder location: Texas date approved: 9/18/2020 last visited: 9/19/2020 |
 view gallery | Cloverdale Tunnel - Custer County, CO in Cave Entrances (Artificial) The Cloverdale Tunnel is part of the Cloverdale mine that is at an elevation of 11,458 ft. posted by: mr.volkswagen location: Colorado date approved: 9/18/2020 last visited: never |
 view gallery | Tykarpsgrottan - Ignaberga, Sweden in Cave Entrances (Artificial) Tykarpsgrottan a man made lime cave posted by: dvddragon location: Skåne, Sweden date approved: 9/9/2020 last visited: never |
 view gallery | Bank-Tunnel - St. Goar - RLP - Germany in Cave Entrances (Artificial) Bank-Tunnel bei St. Goar posted by: CADS11 location: Rheinland-Pfalz, Germany date approved: 9/9/2020 last visited: 8/11/2020 |
 view gallery | Grotto of Lourdes at the Shrine of St Anthony du Padua - San Antonio, TX in Cave Entrances (Artificial) This man-made grotto is a compact replica of the cave entrance in Lourdes, France where a young woman saw apparitions of Mary, the Blessed Mother of God, as many as 18 times. posted by: WayBetterFinder location: Texas date approved: 9/9/2020 last visited: 9/9/2020 |
 view gallery | Groeve De Keel, Kanne, Belgium in Cave Entrances (Artificial) Quarry De Keel is a former marl quarry in Maastricht and Riemst. posted by: Lotty location: Limburg, Belgium date approved: 6/23/2020 last visited: never |
 view gallery | Boolboonda tunnel east adit, Boolboonda , Qld, Australia in Cave Entrances (Artificial) An old rail tunnel posted by: blingg location: Queensland, Australia date approved: 4/13/2020 last visited: never |
 view gallery | Howqua River Tunnel - Howqua, Vic, Australia in Cave Entrances (Artificial) A tunnel constructed to divert the waters of the Howqua River posted by: blingg location: Victoria, Australia date approved: 10/30/2019 last visited: never |
 view gallery | Skocjan Caves, Slovenia in Cave Entrances (Artificial) Cave give access to one of the most impressive caves in Europe. posted by: tofixe location: Slovenia date approved: 9/16/2019 last visited: never |
 view gallery | Old Glory Hole - Pine Mountain Gold Mine Museum - Villa Rica, GA in Cave Entrances (Artificial) Up behind the Stockmar Home (destroyed) is the main entrance..... posted by: YoSam. location: Georgia date approved: 7/15/2019 last visited: never |
 view gallery | Rail Tunnel north adit - Geelong, Vic, Australia in Cave Entrances (Artificial) A railway tunnel beneath Geelong posted by: blingg location: Victoria, Australia date approved: 6/4/2019 last visited: never |
 view gallery | Pinal Mountain Mine Shaft - Miami, AZ in Cave Entrances (Artificial) This old mine opening is now a bat cave. posted by: rjmcdonough1 location: Arizona date approved: 6/4/2019 last visited: 5/24/2020 |
 view gallery | Antiguo Bóveda de Bodega - Firgas, Gran Canaria, España in Cave Entrances (Artificial) Former Bodega Vault under an abandoned hotel complex posted by: Windschattenwanderer location: Islas Canarias, Spain date approved: 3/16/2019 last visited: never |
 view gallery | Cuevas de Bandama - Sta. Brígida, Gran Canaria, España in Cave Entrances (Artificial) Prehispanic cave village in the north face of Bandama Crater. posted by: Windschattenwanderer location: Islas Canarias, Spain date approved: 2/15/2019 last visited: never |
 view gallery | Harpers Ferry Tunnel - Maryland Heights, MD in Cave Entrances (Artificial) A train tunnel in Maryland Heights. posted by: bluesnote location: Maryland date approved: 12/23/2018 last visited: 6/28/2014 |
 view gallery | Silly Mountain Mine - Apache Junction, AZ in Cave Entrances (Artificial) This is the opening to a failed mine in the Superstition Mountains. posted by: rjmcdonough1 location: Arizona date approved: 12/23/2018 last visited: never |
 view gallery | Jelsterkoet, Elst, Riemst, Limburg, Belgium in Cave Entrances (Artificial) Jelsterkoet, the cave of Elst posted by:  TeamYakara location: Limburg, Belgium date approved: 9/4/2018 last visited: never |
 view gallery | De Coolen, Riemst, Limburg, Belgium in Cave Entrances (Artificial) De Coolen is a marl quarry and nature reserve on the border of the districts of Millen and Val-Meer. It is managed by Limburgs Landschap vzw.
The name of the area means: De Kuilen.
The area consists of a small hillside forest, including a medium-sized marl quarry, whose tunnel system covers a length of about 1 km. Some fossils were found in the tunnel system. posted by: TeamYakara location: Limburg, Belgium date approved: 8/20/2018 last visited: 6/7/2020 |
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