Both of you find a cave bear the beach

After kissing, your girlfriend noticed a massive cave near the beach you were on. The cave was hollow, but it lead to an opening of some sort, as she looked closer. "Has this cave always been here?" your girlfriend asks. You look at where your girlfriend was looking, and find the cave that was next to both of you.

"I'm not sure," You explain. "I haven't noticed the cave, until after the walk. There wasn't anyway I spotted it, after I laid my blanket near the umbrella planted a second ago." "We better check out what is inside," your girlfriend suggests. "Who knows what could be in there. Might be buried treasure, or a Poseidon statue." You were just as curious as your girlfriend, but not with the curiosity that makes you think that the cave might have treasure inside, so you follow her into the cave.