I was able to arrange a guided rainforest walk through Agnes Lodge in Munda. This was a very educational experience as there are many plants in the forest which can cure ailments and serve various purposes that are not well-known to outsiders.
If you come to New Georgia, you absolutely must visit this small island just a short ways across the lagoon from Munda. There's a large headhunting shrine filled with the skulls of vanquished enemies from days gone by as well as a beautifully carved casket holding the skulls of local chiefs (arranged chronologically). You can also see some traditional Solomon Islands shell money. The experience is rather eerie, but really brings the traditions and history of the Solomon Islands to life. Make sure you have a good guide--there's a lot to explain and you'll want somebody else to be with you anyway!
Please note that there is a custom fee of S$10 which must paid to the local chief before visiting Skull Island.
For more on this small island, see my "Skull Island" travelogue.
Just a short ways easy of Munda hidden in the jungle is a spot where American military forces during WWII abandoned some large supplies, including barges, tanks, and all manner of military relics. These rusted hulks also seem to support a substantial population of colorful spiders, so be careful you don't pick up any unwanted hitchikers!
Anytime you want to see any particular cultural or historical site in the Solomon Islands, including New Georgia Island, you will very likely have to pay a "custom fee" to the landowner. It's never very much money, but it's essential you pay it so as not to disrespect anyone or create bad feelings towards future travelers. Actually, it makes good sense. Imagine someone coming up to your door and asking if they could have a stroll around the property. You'd probably want to collect fees, too!
Be certain you are in Munda before you get out of the plane. Solomon Airlines is fairly informal about their arrivals, and if you are on a flight with multiple stops (such as Honiara to Munda), the pilot will land the aircraft, drop people off, and be on his way with the remaining passengers. He will not announce the village you've just arrived in, so it is very important that you know exactly where you are when the plane lands. It seems to be assumed that everybody knows where they're going. I had to ask to make sure I was in the right place. It was really kind of funny--the pilot didn't even turn the engine off! We landed, he opened up the door, we got out, and he took off again.
While on my way back from Skull Island, my guide dropped a trolling line off the back of the canoe and after a few minutes appeared to have caught something. It turned out to be a two or three foot long Spanish mackerel! If you'd like to do some fishing in the lagoon of New Georgia, there are obviously fish to be caught.