Is there an alien base in the heart of this Romanian salt mine or what?

It looks like an intergalactic space-hub (or creepy carnival of souls), but this twinkly lit cavern is actually the remains of a 17th century Romanian salt mine.

Salina Turda is now a full-blown recreational attraction, complete with ferris wheel and mini-golf—if you look closely, you can even see little rowboats in the pic above—and also the home to a museum chronicling the deep, deep history of salt mining. At one point a few years back it was rumored to be in the running to play the Batcave in the Dark Knight Rises, but it looks more Arctic World to us.

Is there an alien base in the heart of this Romanian salt mine or what?