First Appearance as the Aquacave: Aquaman Vol. 1 #10 (July-August 1963)
Clipped from www.dcuguide.com:
HISTORY: An airtight underwater cave outside the city of Poseidonis that serves as Aquaman's hideaway and headquarters. During the time when Aquaman had a family life with Mera and Aquababy, it was his permanent home, guarded by Topo the Octopus. The Aquacave was destroyed for some time, but is now in use again as a refuge where Aquaman keeps various trophies and some memorabilia, as well as the Atlantis Chronicles.
Aquacave Map: Adventure Comics #445:
Clipped from www.angelfire.com/mi2/dcuniverse/aquacave.html:
Recently: Aquaman used the Aquacave to hide and protect Jackson Hyde's foster parents from Black Manta, Siren and the Xebel Soldiers.
Dork Note: I love this idea of waterbased technology for the Aquacave. I'd love for DC to give us a new cross section of this lair.