Nereo Cave

{{short description|Sea cave in Sardinia, Italy}}

{{refimprove|date=February 2013}}

{{Infobox cave

| name = Grotta di Nereo
Nereo Cave

| other_name =

| photo = Belvedere della Grotta di Nereo.jpg

| photo_width =

| photo_caption = The "Belvedere" watching terrace,
south upside entrance

| map = Italy

| map_width =

| map_caption = Location of the caves in Italy

| map_alt =

| location = Capo Caccia, Alghero
(SS, Sardinia, Italy)

| coords = {{coord|40|33|42.65|N|8|09|40|E|format=dms|display=inline,title}}

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| depth = 33 m

| length = 4,000 m

| height_variation =

| elevation = 0 m

| discovery =

| geology = Sea cave

| entrance_count = 1

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| access = Public

| show_cave =

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| website = [http://www.adventurediving.it/diving/luoimm/nereo.htm Grotta di Nereo]

}}

Nereo Cave ({{langx|it|Grotta di Nereo}}; {{langx|ca|Cova de Nereu}}) is a huge underwater sea-cave situated on the north-west of Sardinia in the Coral riviera of Alghero, Italy. The name was given by the discoverers in honour of the mythological figure Nereus, who is often billed as the Old Man of the Sea, father of the Nereids.{{cite web|title=Grotta di Nereo (Nereo's Cave)|url=http://www.adventurediving.it/en/divesites/nereocave.htm|publisher=www.adventurediving.it|accessdate=10 November 2012|archive-url=https://web.archive.org/web/20120303205059/http://www.adventurediving.it/en/divesites/nereocave.htm|archive-date=3 March 2012|url-status=dead}} The site is under the high limestone cliffs of Capo Caccia, 100 metres north of the famous Neptune's Grotto.