Fodor's Expert Review Kaeleku Caverns
If you're interested in spelunking, take the time to explore Kaeleku Caverns (aka Hana Lava Tube), just after mile marker 31 on the Hana Highway. The site is a mile down Ulaino Road. The friendly folks at the cave give a brief orientation and promptly send nature enthusiasts into Maui's largest lava tube, accented by colorful underworld formations. You can take a self-guided, 30- to 40-minute tour daily 10:30–4 for $11.95 per person. LED flashlights are provided.