These elegant structures can serve as a transition from one part of the property to another. The arbor can provide some privacy on small lots. One can hang flower baskets and add a nice country gate with ornate hardware.
You can carry the timber frame theme outdoors along with your timber frame home or cottage. Details may include ornate finial tops of posts, architectural metal boots for posts bottoms and themes in the pickets such as barn swallows or a flock of geese flying. Proper wood selection , good preparation of wood and good stain will help in longevity.