Watch sunset from a beach swing on Gili T's west coast

Take a 4-hour snorkeling boat tour to all three islands (IDR 300,000)

Get PADI Open Water certified (around $300–350 for a 3-day course)

Visit the underwater statues off Gili Meno for snorkeling or diving

Bike around the full perimeter of any island (Gili T takes about 1.5 hours)