There are a multitude of companies that offer tours of varying lengths, routes, and glacial experiences; as such, not every company will offer a tour of all landmarks described here. Please choose a tour that best suits your tastes and time allotment. All tours provide a packing list; generally, you will be expected to supply your own water, snacks, and warm-weather gear, but safety gear will be provided. Lastly, Switzerland is part of the Schengen area, and travelers from outside this area are required to present a valid passport or visa to enter.