The Oregon Coast Aquarium in Newport is a great place to visit and explore.  Dove took Noah and Eden for a field trip while I was away for work. They had a great time and saw some very big spider crabs from Japan.  Jonathan and Rochelle also went for a visit just last week (see Jon's post here).  One of the main attractions is their Passages of the Deep, which leads you through tunnels below the aquarium.  Very cool!