lift and underground lake in solina tudra, transylvania, romania.

active architecture cave cluj cold construction corridor deep depth design digging drift earth elevator excavation exploration fantastic friends futuristic gallery hallway health hedgehog holidays illuminated indoors industrial industry inside lake lamps layers light looking machinery mine mineral mines mining mystery nature passage people perspective pit queue rock romania saline salt stone structures stunning superb tourism tourists tours translucent transylvania travel tunnel turda underground underpass unique useful visitors wall walls wellness