To visit Jewel Changi during a layover, you must pass through Immigration and Customs, as Jewel is located in the "landside" (public) area of the airport. If you have at least 5 hours, you can clear passport control (ensuring you have the proper visa or the 96-hour visa-free transit facility) and walk directly to Jewel from Terminal 1, or via link bridges from Terminals 2 and 3. If you have a shorter layover and don't want to clear immigration, you can take the Skytrain that connects Terminals 2 and 3, which passes right through the center of Jewel and gives you a magnificent view of the HSBC Rain Vortex waterfall without leaving the secure area. By 2026, the process remains streamlined, but travelers are reminded to leave at least 60-90 minutes to clear security and return to their departure gate.