This gorgeous garden has evolved from a family-owned 19th-century estate into a peaceful oasis east of the center city that is kept in good order by an army of gardeners. Originally landscaped as an English country garden, the arboretum today has more than 4,000 trees, bushes, and perennials. Oak, pine, cedar, hostas, and rhododendron are particularly well represented, and there are a rose garden, goldfish pond, aviary, and glasshouse full of cacti and succulents. With a variety of bridges and benches, the garden is a perfect antidote to exhaustion-inducing sightseeing.