Depending on where you stay, Oahu can be incredibly busy and touristy, Waikiki especially. If you find yourself there, please only stay in Waikiki one night. Or at the least, get a rental car the whole time and go explore every part of the island! This Valley of the Temples, is on the East side of the island, and is well worth going through a tunnel under the mountains! Even though it's pretty scary!
And instead of a long, picture loaded post, I've decided to make short movies for you! Please let me know what you think, and if you'd rather a movie than still photos! I aim to please, my friends!
I hope you enjoy, and if you are ever on the island, do yourself a favor and go spend about 2 hours just enjoying these grounds.