- Visiting Iceland
- Travel Information
- FAQ
- Protected Areas
- Westfjords
- Breidafjordur
- Dynjandi in Arnarfjordur
- About the area
- Access and services
- Nature
- Culture and history
- Drone use at Dynjandi
Dynjandi in Arnarfjordur - Flatey in Breidafjordur
- Hornstrandir
- Hrisey, Reykholahreppur
- Surtarbrandsgil
- Vatnsfjordur
Westfjords - North West
- North East
- Boggvistadafjall
- Dettifoss and a row of waterfalls
- Dimmuborgir
- Public park in Glerardalur
- Reservation in Svarfadardalur
- Godafoss in Thingeyjarsveit
- Hraun in Oxnadalur
- Hverastrytur in Eyjafjordur
- Hverfjall
- Krossanesborgir
- Myvatn and Laxa
- Seljahjallagil
- Skutustadagigar
- Vatnajokull National Park
- Vestmannsvatn
North East - West
- Andakill
- Bardarlaug, Snaefellsbaer
- Blautos and Innstavogsnes
- Breidafjordur
- Budahraun
- Einkunnir, Borgarbyggd
- Eldborg in Hnappadalur
- Geitland, Borgarbyggd
- Grabrokargigar, Borgarbyggd
- Grunnafjordur
- Hraunfossar, Borgarbyggd
- Husafellsskogur, Borgarbyggd
- Kalmanshellir
- Melrakkaey
- Stedji (Staupasteinn)
- The coast by Stapi and Hellnir
- Vatnshornsskogur, Skorradalur
- Snaefellsjokull National Park
West - Search by name
- East
- South West
- Akurey
- Alafoss, Mosfellsbaer
- Astjorn, Hafnarfjordur
- Astjorn and Asfjall, Hafnarfjordur
- Bakkatjorn, Seltjarnarnes
- Blafjoll Public Park
- Borgir, Kopavogur
- Bringur, Mosfellsdalur
- Burfell, Gardabaer
- Eldborg in Blafjoll
- Eldborg in Geitahlid
- Eldey, Reykjanesbaer
- The shore by Kasthusatjorn
- Fossvogsbakkar, Reykjavik
- Gardahraun, Gardabaer
- Galgahraun, Gardabaer
- Grotta, Seltjarnarnes
- Hamarinn, Hafnarfjordur
- Haubakkar, Reykjavik
- Hleinar, Hafnarfjordur
- Hlid, Alftanes
- Hvaleyrarlon and Hvaleyrarhofdi
- Kaldarhraun and Gjarnar
- Kasthusatjorn, Alftanes
- Laugaras, Reykjavik
- Litluborgir, Hafnarfjordur
- Raudholar, Reykjavik
- Reykjanes Public Park
- Skerjafjordur, Gardabaer
- Skerjafjordur, Kopavogur
- Stekkjarhraun, Hafnarfjordur
- Trollaborn, Lækjarbotnar
- Tungufoss, Mosfellsbaer
- Valhusahaed, Seltjarnarnes
- Varmarosar, Mosfellsbaer
- Vifilsstadavatn, Gardabaer
- Vigholar, Kopavogur
South West - South
- Alftaversgigar
- Arnahellir in Leitahraun
- Dverghamrar
- Dyrholaey
- Fjallabak Nature Reserve
- Geysir Area
- Gullfoss
- Herdisarvik
- Jorundur in Lambahraun
- Kerlingarfjoll
- Kirkjugolf
- Oddaflod
- Pollengi and Tunguey
- Skogafoss
- Surtsey
- Area in Thjorsardalur
- Vatnajokull National Park
- Videy in Thjorsa
- Thingvellir National Park
- Thjorsarver
South - Mývatn and Laxá
- National Parks
Protected Areas - Westfjords
- Permits in protected areas
- Operational licence
- Photography, cinematography and drone flying
- Research permit
Permits in protected areas - Drones in protected areas
- Guidelines for using drones in protected areas
- Flights in protected areas
- Apply for permit
Drones in protected areas - Volunteers
- Snæfellsjökull National Park
Visiting Iceland - Wildlife
- Air & Climate
- Ocean & Water
- Industry
- Chemicals
- Frequently asked questions
- Biocides
- Classification and labelling – CLP
- Cosmetics
- Detergents
- Fluorinated greenhouse gases (F-gases)
- Fuel
- Supervision, inspection and coercive measures
- Certificate for pest control
- Plant protection products
- POPs
- Certificate for professional use of plant protection products
- REACH
Frequently asked questions - Biocides
- Classification and labelling
- CLP
- Classification
- Labelling
- Packaging and retention
Classification and labelling - Cosmetics
- Detergents
- F-gases
- Fuel
- Plant protection products
- Authorisation
- Harmonised Risk Indicators
Plant protection products - POPs
- REACH
- Fees
Chemicals - Frequently asked questions
- Importation of Alien Species
- ETS
Industry - Chemicals
- Circular Economy
- Waste
- Waste Management
Circular Economy - The Agency
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Arnahellir in Leitahraun
Árnahellir was protected as a natural monument in 2002. The cave has unique geological formations and is in the same category as very few caves on Earth that boast such beautiful and unspoiled lava formations. Árnahellir is a world-class natural phenomenon and was discovered in 1985.
Árnahellir, as well as Jörundur, Híðið and Borgarhellir, are among the most beautiful caves in Iceland due to its diverse color palette.
Árnahellir is approx. 20 m below the surface, 10 meters wide with a low ceiling. Árnahellir is approx. 150 m long (44th longest of all known caves in Iceland). The stalactites in Árnahellir are too many to count and can be likened to a jungle. The longest stalactites in Árnahellir are just over 1 m and around 7 cm in diameter. Some of the stalactites are partially covered in gypsum, up to 15 mm thick. The longest soda straws are around 60 cm. The cave ceiling is almost covered in soda straws, 5–10 mm in diameter. Exotic minerals have been found in Árnahellir, such as a 2 cm long turquoise stone, an opal.
The natural monument is 8 ha.
