The Gili Islands are three tiny, car-free islands off northwest Lombok: lively Gili Trawangan, quiet Gili Meno, and laid-back Gili Air. Underwater, warm water (often 26°C to 30°C) meets fringing reefs, shallow walls, turtle hotspots, and a handful of current-swept drifts for advanced divers. Most diving and snorkeling takes place inside TWP Gili Matra, a national marine conservation area where official entry tickets (karcis) apply for water-based activities. Logistics are easy: short boat rides, many beginner-friendly sites, and a strong conservation storyline you can support through local reef-restoration efforts. Topside is simple and fun: cycle, walk, swim, watch sunsets, then hop over to Lombok for waterfalls and Mount Rinjani trails.