The many waterfalls... Rainbow falls, to Akaka falls, and many in between.
The lush greenery in this area is spectacular. Makes you feel like you have just entered a different world.
Fondest memory: The natural lush green rainforests, and the beauty of the waterfalls, is spectactular.
Visit Akaka Falls and Rainbow Falls, just north of Hilo town. They're beautiful waterfalls, and easily accessible.
Fondest memory: I don't know if this is a 'fond' memory or not, but I was visiting a friend in Hilo over Christmas one year, and it was raining. Not the drizzle, off and on type of rain I was used to, but a moderate downpour. It kept on raining at that rate all day long. Apparently this is par for Hilo, and they're used to the wetness.