It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, There, they find a cave filled with magical darkness. Keyleth shifts into an earth elemental to scout the cave, finding that it contains a strange planar rift and a group of grick.
DM: There is a singular cave on the far end. There's a slight outcropping, and then it leads into that one 20-foot-wide cavern that goes deeper in there.
Player: I'm going to creep up just to the edge of the cave. I'm not going to go in. Is it a separate perception check for the inside of the cave as well?
DM: Yes.
Player: All right.
DM: You want to make a stealth check one more time? Stealth check first.
Player: Stealth check is good. It's a 21. 31.
DM: 31, okay. So making your way up, you dodge from low on the side of the beach, jumping in front of these strange stone platforms, keeping in, look for cover. You make your way up against the side of a wall, begin to glance inside. Make a perception check.
Player: And that is 19.
DM: 19. It's pitch-black in the cavern. You have no light source, unfortunately. You have darkvision, which does help you to a certain extent. You cannot see the entirety of the cavern, but you can see about, let's say, 40 to 60 feet in. The beach gravel comes to a halt and comes to this smooth stone flooring. You don't see anything that particularly catches your attention.
Player: Manufactured or made, or just paved floor?
DM: It looks like it has some natural change in the topography. It's not a polished floor, but it's definitely been worn over time.
