SS Hjejlen (Danish for The Golden Plover) is one of the world's oldest operational paddle steamers, built in 1861 by Baumgarten & Burmeister, commissioned by a group of citizens headed by paper manufacturer Michael Drewsen. She is used to carry tourists between Silkeborg and Himmelbjerget, but in 1932 she also became a public mail boat.
Hjejlen's engine has two cylinders with a diameter of 10 cm (3.9 in) and a stroke length of 42 cm (17 in) each. The engine yields 40 hp and goes up to 8 kn.
In 2011 Hjejlen celebrated her 150th anniversary with Queen Margrethe II in attendance. A commemorative coin was issued by the National Bank of Denmark.