Taller than Nelson's Column, longer than four football grounds, owned
and operated by Royal Caribbean International - MS Allure of the Seas is
the world's largest cruise ship. Together with her sister ship, Oasis
of the Seas, she holds the record for the largest passenger ship ever
constructed. The Allure is just 50 millimetres (2.0 in) longer than the
Oasis, making her technically the largest despite the fact that both
ships have identical superstructures.