On our first full day, we walked about KLCC, Kuala Lumpur city center, and saw the Petronas Towers as well as the KL tower and a bunch of other pretty and architecturally interesting buildings. But before we did that, we visited the Batu Caves.
The second cave is called the Dark Cave and you have to pay quite a bit to visit it as its deemed more for excursionists who want to spend five hours walking through a pitch black dark cave, one of the biggest caves you can visit in the world. We skipped that one and did the third cave instead, which you have to pay a fee of 5 ringgit to get into, but it was well worth the price for the sculpture and artwork installation in it that told the story of Lord Rama. This cave, the Ramayana Cave was my favorite. It was just so beautiful and quiet because most people skipped it and just did the main cave instead.
Best places though in Penang to check out should you ever find yourself in Georgetown are The Mugshot Cafe, Kapitan, the best Indian restaurant on the island, and the various street art installations and paintings all over Georgetown.