We visited Tacoma on a Sunday and found that Union Station was the only Chihuly display closed - it is a Federal Courthouse. We had to peek through the doors and look from a distance but even so, the Chihuly exhibits were beautiful. The building itself is fantastic.
Be sure to take the elevated walkway to the Museum of Glass. The ceiling and wall have a huge exhibition of Chihuly glass and is one of the best things to see in Tacoma.
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