Increasing the difficulties for tourism to the Sound is the location within Fiordland National Park, which prevents substantial accommodation from being built - around 90% of all tourists are therefore only on a day trip, and around 80% return in the late afternoon to Te Anau, or Queenstown, a 12-hour round trip. Due to the long trip from Queenstown, a majority of tourists arrive and depart quickly, leading to a great peaking of demand at the day-cruises terminal where the large tourist boats lie empty for most of the day, becoming extremely active only during the 3–4 hours around and past noon.