"Nighttime at the Arboretum", another incredibly shot by Seattlest Flickr contributor Cap'nSurly If you have to head east this weekend, your only options to get across Lake Washington are to take I-90 or the long drive north around the lake. (Technically you could also boat, paddle, or swim across we suppose.) State Route 520/The Evergreen Point Floating Bridge will be closed for the entirety of the weekend--from 11 p.m. Friday to 5 a.m. Monday--for its......