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Seattle Underground Skylight

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flickr-32121683755.jpg Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!Murder in the UndergroundThumbnailsSeattle Can be Saved... by Steam!

Manganese glass prisms mounted in the sidewalk to illuminate the earlier (pre-1889) lower level sidewalks.