Except for electricity generation (at the Manapouri Power Station and a smaller hydro-electric power station at Lake Monowai) and some agriculture, tourism is the only other major economic factor of the region. Visitor spending was NZ$92 million in 2003, and 1,017 people were employed full-time in the tourism industry, with an additional 1,900 people considered to be employed in tourism industry support services. Most tourists visit Milford Sound / Piopiotahi, though walking in the more accessible eastern parts of the alps is a popular activity. Nonetheless, the remoteness of the region limits even tourism, and after short visits to the major sites, most tourists return to other areas, such as Queenstown or Invercargill.