Hideous Headmen's Heinous Headquarters

Previously we had discussed the first headquarters of the Injustice Gang, as well as the later base of operations for the Injustice Society's Brainwave and his henchmen aboard a pair of orbiting satellites. However the more famous sinister citadels for these megalomical menaces were locales also frequented by their arch-enemies, the Justice League and Justice Society!

Throughout the formative initial years of the Justice League, they utilized a cave just outside the seaside town of Happy Harbor, which they refashioned into a stylized headquarters. Contained therein was a centralized meeting room, as well as a trophy room, gymnasium, library, kitchen, and hanger for the team's various aircraft. This fortress of solitude was used up until honorary League member Snapper Carr betrayed his teammates, revealing the cave's location to Batman's arch-enemy the Joker. The League abandoned the site, building their own satellite headquarters in its place, more inaccessible to their adversaries.

Following his first foray versus the Justice Society, Brain Wave transitioned his base of operations from a highend skyscraper condo into a lighthouse off the coast of Sharktooth Bay. This locale included a meeting room, laboratory and a dungeon. From this tower, Brain Wave launched to attacks against his arch-foes, first by capturing the Society members and later by shrinking the team.

Abra Kadabra, an adversary of the Flash from the 64th century, recruited the Injustice Gang into forming its third incarnation. He schemed that the League's now abandoned Happy Harbor cave would be the ideal location for the Gang. However, the Justice League along with Earth-Prime's sole superhero Ultraa tracked the supervillains to the old HQ and defeated them.

Similarly, while not an intentional headquarters for the Society, the Sharktooth Bay tower was more like their recurring prison. Their girlfriends, dressed up like the heroes themselves, helped free the Society members who then vanquished Brain Wave. Later, a return engagement with the Brain Wave led to his tower being permanently destroyed when Society ally Thunderbolt moved the criminal's bomb from where the heroes were to underneath the tower itself!