The Nemi ships were built on Lake Nemi, near Rome, and were the largest ships of their time. The larger of the two ships measured around 70 meters (230 feet) in length and had multiple decks, elaborate decorations, and luxurious amenities. It was equipped with marble floors, mosaic artwork, and even a heated swimming pool. The ships were also equipped with advanced engineering features for their time. They had a rotating dining room that could turn to provide guests with different views of the surrounding lake. The vessels were powered by a combination of sails and oars, allowing them to navigate both in open waters and in confined spaces.

Caligula used the Nemi ships for various purposes, including hosting extravagant parties and entertaining his guests. However, the ships were only in use for a short period before they met a tragic fate. In 41 AD, Caligula was assassinated, and the ships were left abandoned. The Nemi ships remained submerged in Lake Nemi for centuries until they were rediscovered in the 1920s. Efforts were made to salvage and preserve these ancient vessels, but unfortunately, they were destroyed during World War II. Despite their destruction, the Nemi ships are still remembered as remarkable examples of Roman engineering and opulence. Their grandeur and size continue to captivate historians and archaeologists, providing insights into the extravagance of the Roman Empire during Caligula's reign.