This is one of the cutest photos from the trip to Hawaii. On our second day, we hiked down to the Secret Lava Pools south from Hanalei. At end of the shore, there was a deep pool that we could all swim in while the waves crashed around us. You could even dive a bit and chase tropical fish (hence, Rob's too-small goggles).
Tip: wear sneakers while hiking out to the pools! We ditched our sandals early and got quite the "lava rock pedicure."