Use an oversized urn with a sprawling palm tree. A 19th century Victorian Hall Tree in the right home would be beautiful and functional. An antique store would be the best place to look for a piece like this or better yet an auction or estate sale. Use a pair of corbels topped with marble or a pair of iron supports topped with glass for a shelf to hold a vase of flowers, keys and mail.
In a small foyer maximize the light and make a tight area feel less cramped with a floor to ceiling mirror. Your foyer may be a tiny space with only a coat closet and no place to hang a mirror. So why not mirror the closet door! This will make your space appear larger. Depending on how your closet door is positioned, it may double a gorgeous view of the outdoors.