Big Bertha

Start at the at Milepost 31 information center to view Pioneer Square history/geology and tunnel exhibits, and then take a roughly one-hour walking tour of the Seattle waterfront tunnel project. Closed-toe shoes are a must for this tour.

  • Difficulty: Easy
  • Length: 2.5 mi
Map
211 1st Ave. S, Seattle, WA 98104
Activities
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Titles

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  • Big Bertha Tunnel Project
  • Seattle Waterfront Tunnel Project
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