There's more to Seattle's north end than coffee shops and ferry rides — these neighborhoods hide some genuinely quirky history.

• Green Lake's sunken sister: The lake once had a sister body of water called Licton Springs just to the south, whose red-stained mineral waters were considered sacred by the Duwamish people and later bottled and sold commercially in the early 1900s as a health tonic before development buried most of the springs.

• Wallingford's industrial past: Before it became a bungalow-lined residential neighborhood, Wallingford was home to one of Seattle's largest brickworks, and the clay soil excavated there left depressions that still subtly shape the neighborhood's topography today.

• Ballard's independent streak: Ballard was a fully independent city with its own mayor and city hall until 1907, when it was annexed by Seattle — and locals resisted so strongly that the phrase "seceding to Ballard" is still invoked humorously whenever Seattle neighborhoods push back against city policy.

• Northgate's mall milestone: Northgate Mall, which opened in 1950, is widely credited by urban planners as the first shopping center in the United States to use the word "mall" in its name, helping define an entire retail vocabulary for the decades that followed.

• Edmonds' underwater park: Edmonds hosts one of the few designated underwater parks in Washington State, where a deliberately scuttled dry dock and artificial reef attract divers year-round, making it a rare saltwater dive destination accessible directly from a city pier.