Canals are an easy way to travel around the city. A municipal canal-bus system travels three different routes throughout the city, allowing locals an easy way to get to and from work and giving visitors the opportunity to travel from one attraction to the other on the water. The canals are also a thriving part of the tourist infrastructure of Amsterdam in that many locals operate tour boat businesses on the canals. The canals in Amsterdam also provide a popular place for recreational activities, from boating to parades. Many of the city's special events are held upon the waters of the canals. In the winter, locals ice skate on the frozen waters and then retire to the local eatery for a traditional cup of "snert" - pea soup.