The Apollo program was powered by the mighty Rocketdyne F-1 engine [nasa.gov], the most powerful liquid-fuel rocket ever developed. Five engines were used on each Saturn V launch. They would burn for about two and half minutes before separating and falling back into the Atlantic Ocean. In 2013 a Jeff Bezos funded expedition located a debris field of F-1 engine remains sitting over 14,000 feet under the ocean surface [bezosexpeditions.com]. The recovered parts have been put through a conservation process [collectspace.com] to identify them and remove some of the effects of sitting on the ocean floor for more than 40 years. At the request of Bezos, NASA has donated [seattletimes.com] a recovered Apollo 12 [si.edu] engine to the Seattle Museum of Flight [museumofflight.org].