Coast Guard Cutter Eagle has opened up for free public tours at Canary Wharf.
Docked at South Quay, the vessel, known as America's Tall Ship , will be open until Monday, June 13.
The 90m ship is a three-masted barque with more than 6,797sqm of sail and 9.7km of rigging.
Eagle has served as a classroom at sea to future coast guard officers since 1946.
It was constructed in 1936 by the Blohm and Voss Shipyard in Hamburg, Germany and was originally commissioned as Horst Wesell by the German Navy.
America received Eagle as part of the reparations following the Second World War.
During this voyage, she has hosted cadets from the Royal Malaysian and Honduran navies.
After departing London, the vessel will set her course for Madeira, Portugal, following the same route it charted when first coming to the United States 80 years ago.
Follow The Wharf on Twitter @the_wharf .
Keep up to date with all our articles on Facebook .