Bern, the capital of Switzerland, is nestled in a bend of the Aare River. During the summer months, this river becomes popular for watersports. Some people like to pack their belongings in a dry bag (wickelfisch) and float down a stretch that takes about 90 minutes of travel.
Last year, Business Insider reported that some workers use the river to commute to or from work. It only works one-way (sorry, but few rivers flow in a circle). Aside from the time that it takes to change clothes and pack one's belongings into a dry bag, this can be an efficient mode of transportation.
-via Marilyn Terrell