The markets in Port Vila are definitely worth visiting. They run every day except Sunday and you can buy everything from fruit and vegetables to wood carvings, jewellery and clothing. Prices are fairly good (especially for the local produce) and the people are very friendly.
We got this tour free with our accommodation/flight deal so we figured we might as well go along even though we didn't know what to expect. Bascially it was an educational tour on kava (the local drink)...
Funnily enough, our chef from the resort was the Chief and guide for the tour. He told us all about kava and then gave us a taste (our second kava drink). The tour was great and is worth doing...it costs 1500 vatu.
I found the best way to see all of Port Vila is to hire a car. You can travel around the whole island in one full day and take it all in. On the way you can drop past the Mele cascade falls and see how the real people of Vanuatu live.
The road is all dirt track with more pot holes than coconuts on the island so try to get a 4wd, we took a little 4 cylinder car and nearly lost the wheels a few times.
Hop on a bus or taxi and go to see the famous Mele cascades if you don't want to tour the island due to lack of time. A 20-minute trip from Port Vila will take you there. The vista’s are amazing and the cool, soft sensation of the falls are worth getting wet for! Enjoy the hot mineral springs or shower in the cascading waterfall.
There's an admission fee.