From Eurogamer: “The Children of the Vault, the villains of Borderlands 3, are using Broadcast Towers to spread their propaganda. Mad Moxxi has a plan though – sabotage the tower and use them to play Crimson Radio.
Get your climbing skills ready, because these Broadcast Towers are hidden across the planets of the Borderlands galaxy, including Athenas, Promethea and good old Pandora.”
Source: N4G PC Borderlands 3 Crimson Radio – Broadcast Tower locations explained