Visitors to Seattle are usually stunned by the abundance of water surrounding the city. Just north of downtown lies Lake Union. Surrounded by houseboat communities, marinas, shipbuilders and glitzy restaurants, the lake is a hub of activity. Seaplanes take off and land, sharing the 600-acre lake with kayaks, canoes, powerboats, sailboats and tugboats. While the lake can be explored any time of year, Fireworks Over Lake Union are an annual highlight, bringing thousands of people to the lake's shores. For a day out with children or friends, Lake Union never disappoints.