Rena’s cave was great! It was clean, charming and exactly what we wanted. It’s a bit removed from the busy hustle and cruise ship crowds which was fine with us (two adults and two kids). Just an extra minute down and it’s quiet, dark and a great way to experience Oia. We felt almost like locals as we took the side path past the throngs of tourists down to our cave. She even offered kayaks which we ended up not using but we greatly appreciated the offer. We recommend the cave highly.