The Laboe Naval Memorial is a memorial located in Laboe, near Kiel, in Schleswig-Holstein, Germany. Started in 1927 and completed in 1936, the monument originally memorialized the World War I war dead of the Kaiserliche Marine, with the Kriegsmarine dead of World War II being added after 1945. In 1954 it was rededicated as a memorial for the sailors of all nationalities who were lost at sea and at the same time a memorial for peaceful sailing in open seas.
The monument consists of a 72-metre-high tower topped by an observation deck. The deck stands a total 85 m above sea level. A hall of remembrance and World War II-era German submarine U-995, which houses a technical museum, both sit near the foot of the monument, and the site is a popular tourist venue. U-995 is the world's only remaining Type VII U-boat.
Wikipedia https://en.wikipedia.org/wiki/Laboe_Naval_Memorial
Coordinates 54°24'43.835" N 10°13'50.791" E