The Grand Tour was the principally 17th- to early 19th-century custom of a traditional trip through Europe, with Italy as a key destination, undertaken by upper-class young European men of sufficient means and rank (typically accompanied by a tutor or family member) when they had come of age (about 21 years old).

The custom—which flourished from about 1660 until the advent of large-scale rail transport in the 1840s and was associated with a standard itinerary—served as an educational rite of passage. Though it was primarily associated with the British nobility and wealthy landed gentry, similar trips were made by wealthy young men of other Protestant Northern European nations, and, from the second half of the 18th century, by some South and North Americans.

By the mid-18th century, the Grand Tour had become a regular feature of aristocratic education in Central Europe as well, although it was restricted to the higher nobility. The tradition declined in Europe as enthusiasm for classical culture waned, and with the advent of accessible rail and steamship travel—an era in which Thomas Cook made the "Cook's Tour" of early mass tourism a byword starting in the 1870s.

However, with the rise of industrialization in the United States in the 19th century, American Gilded Age nouveau riche adopted the Grand Tour for both sexes and among those of more advanced years as a means of gaining both exposure and association with the sophistication of Europe. Even those of lesser means sought to mimic the pilgrimage, as satirized in Mark Twain's enormously popular Innocents Abroad in 1869.