These two were apprehended in Lisbon - which has a major cruise line business, with unbelievably large vessels.
Liners are getting so much larger - with, for example, the Symphony of the Seas able to cater for nearly 9,000 passengers and crew.
About 1,200 feet long - this ship ( and others) have a High Street running the full length. With shops, cafes, pubs, restaurants, cinemas, theatres, casinos, nightclubs etc.
For some reason, this market has expanded dramatically in recent years - with seaports, all over the world, vying for custom.