Open Sesame!

The intercom on the door is silent, completely ignoring your kicks, spits and curses. Is there any way to get into the cave from the outside? Blowing up the door is hardly an option.

However, the strange symbols on the intercom look vaguely familiar to you. Of course! You've already seen similar inscriptions and images on the stones and column remains in the old ruins.

One of the stones with the enigmatic symbols is located somewhere in the ruins to the west of the cave. Another old stone covered in mold and mud is somewhere amidst the Rusty Salt Marshes, so it won't be easy to find. Also, you remember hearing about some interesting bas-reliefs on the ruins beneath the waterfall. If you inspect all three stones, you will probably be able to pick the password to open the cave.