Amsterdam is famous for its laissez-faire attitude about extracurricular activities, its beautiful canals and of course, its bicycles. Now, even if you only have a layover at Amsterdam's Schiphol Airport, you can get in some pedaling, and power your phone and other devices at the same time.
Schiphol is one of the airport homes for WeBikes — cycling desks that generate power. About 30 minutes of pedaling is enough to charge an iPhone, according to its designer. They seat three to a table, but can be configured for more.