You can also buy them in person via booth, or any of the kiosk computer things just outside the doors
I printed a voucher on my PC and then at my first location of choice to use my Seattle City Pass, the booklets were issued.
They will be emailed with a scannable barcode.
No, you will receive them in your mail. They contain a barcode which can be scanned during admission. No need to print the tickets.
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