Garden Arbours
Garden arbours (arbors) are open frameworks designed to offer shady resting places in a garden or park. Arbors are often made of rustic work or latticework which serves as a trellis on which climbers may grow or on which creepers may be trained.
There are the classic grape arbors, in which case the structure has a horticultural function -- serving as a trellis for a crop. Specifically grape arbors come to mind for this use due to their historical prevalence.
But such structures -- in conjunction with the vines that grow on them -- can also serve as privacy screens. Another function is to provide shade, including on decks and patios. More often, they have primarily an aesthetic purpose. Some landscapers like the look of a wooden archway that forms an entrance to a garden. Indeed, the arched arbor is perhaps the most popular style, currently. For instance, they can function as entry gates for properties surrounded by fencing.