When you get tired of hiking up mountains, take the family in the opposite direction and explore this cool lava cave. It’s about a mile long and requires climbing over boulders and rocks, guided by flashlights and head lamps–so you’ll definitely feel like you’re on an adventure! Bring jackets, because the cave can be chilly, and make sure to wear appropriate shoes or boots. Some young children may be afraid to go in, so it might be best for older kids. Those who are claustrophobic or afraid of the dark, this probably isn’t the activity for you either!