Honolulu is a beautiful city in Hawaii, it is filled with relaxing activities for your vacation. For an educational trip, I would visit the pearl harbor memorial or the USS Arizona memorial. If you like yoga there are a lot classes on the beach, would be pretty cool. Plus in Honolulu there a ton of hiking trials, like the Koko head Carter trail. It is a hiking trail from the Koko head district Park to the bottom of the Koko head Crater. If you want to see some ocean life I would travel to the Hanauma Bay preserve, you can snorkel alone the coral reef to see some fish.