Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
The Caves of No Return is a location mentioned in the Sonic the Hedgehog television series. It is a place used by the Wolf Pack to ward off intruders.
Although never seen, Lupe suggesting that their enemies should be led to the Caves of No Return might suggest it is a place with traps and weapons to prevent enemies from invading their home base.
When Snively's robots entered the hideout of the Wolf Pack, Lupe instructed her men to lead them to the Caves of No Return in order to defeat them.