Esja is a 914 m mountain situated in the south-west of Iceland, about ten kilometres north of Iceland's capital city Reykjavík.
Esja is not a single mountain, but a volcanic mountain range, made from basalt and tuff.
Wikipedia https://en.wikipedia.org/wiki/Esja
Official website http://www.visitreykjavik.is/mount-esja
Address Þverfellshorn, Reykjavik, Iceland
Coordinates 64°14'42.248" N -21°39'33.412" E