There's a waterfront trail, campground and a playground for kids. Sea eagles and otters to spot, occasionally also whales or seals.
Alaska.org site http://www.alaska.org/detail/seward-waterfront-park
Address 525 Ballaine Blvd, Seward, AK 99664, USA
Coordinates 60°6'22.514" N -149°26'7.642" E