Think of what Seattle could have done here if we hadn't replaced our own elevated highway on the waterfront with a surface highway
https://www.theguardian.com/world/2025/jan/17/seoul-cheonggyecheon-motorway-turned-into-a-stream
https://www.theguardian.com/world/2025/jan/17/seoul-cheonggyecheon-motorway-turned-into-a-stream
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Several folks told me they like the walking area below Pike Place Mkt. I haven't been there so can't comment on that.
They tore out a highway across the city and change that into a canal.