What is the setting of The Innocents Abroad by Mark Twain?

The environment of the story is transcontinental, since this is a travel excursion. Destinations focus on Spain, Italy, Greece, Russia, Turkey and the Holy Land. Many events take place between destinations on board the Quaker City cruise ship. Nearly everything, with the exception of the Quaker City, is portrayed as ancient. So the environment overall is very old and historic. Filth and lack of hygiene are frequently present in every scene.