If I remember right, you should get a cave entrance option at Forest Path? Try exploring it until you get it, I guess..
Or were you talking about Ste's house? Then yes, keep wandering around.
I can't seems to find She's house. I've been wondering in the river bank
Go to bridge then choose the "find another way" option. You will find 5 glowshrooms and find a cave. GO to ruins and talk to Othre, she then give you a glowing medal (equip it). Go to the cave again and explore underground.
