Bellevue's finest green space sprawls across 53 acres of cultivated gardens and natural wetland east of downtown. The Botanical Garden is free to visit and rewards a slow walk: the rhododendron glen is spectacular in late April, the dahlia display runs from July to October, and the Yao Japanese Garden — a gift from Bellevue's Japanese sister city — brings formal design into conversation with the surrounding Northwest forest.
The garden's wetland loop trail winds through a recovering lowland forest that gives a sense of what the Bellevue flatlands looked like before development. The seasonal blooms mean no two visits are quite the same, and weekend guided walks (free with admission, which is free) are genuinely informative. Open daily from dawn to dusk; the visitor centre has hours slightly more restricted.