Milford Sound / Piopiotahi, a stunning natural fiord, is primarily accessed via a challenging but scenic road (State Highway 94) from Te Anau, with coach tours highly recommended over self-driving for safety and relaxation; scenic flights also offer access. Guided boat cruises are essential to experience the sound, and guided kayaking tours are also popular. The destination is open year-round, though winter (June-August) may bring road closures due to snow, while summer (December-February) is peak season; be prepared for significant rainfall which creates spectacular waterfalls regardless of the season. Costs vary widely, from approximately NZD $150-$300+ for a full-day bus and cruise tour from Queenstown or Te Anau, with cruises alone typically costing NZD $80-$150. A typical visit involves a 1.5-2.5 hour cruise, but the full journey from Queenstown can be a 12-14 hour day trip; overnight cruises are also available. Expect limited cell service and bring sandfly repellent; booking well in advance is advisable, particularly for peak times.