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Explore the Hidden Geology of Downtown Seattle

Central Business District

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In a Nutshell

Naturalist David B. Williams takes you through downtown and reveals the billions of years of history infused into the city’s architecture

The Fine Print

Promotional value expires Sep 14, 2014. Amount paid never expires. This deal is for the purchase of a ticket. Reservation required prior to event. Dates subject to capacity and cancellation. Refundable only on day of purchase. Min. of 8 participants or experience subject to cancellation. No value after experience date & time have passed. Must be 18 or older. Gratuity included. Magnifying glass recommended. By completing your purchase, you agree that the email address you provide will be shared with SideTour for marketing purposes and as described in SideTour’s Privacy Policy. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

The Deal

  • $25 for one admission to a geology-themed city tour with naturalist David B. Williams
  • Upon purchase, you may schedule for one of the available dates
  • You must reserve your date here in advance of the event

Groups meet at the southeast corner of 1st Avenue and Madison Street.

Each event is capped at 16 purchasers.


What You’ll Do

Although Seattle’s buildings look modern, the stones used to make them are actually much, much older than they appear. During this two-hour tour of the downtown area, you’ll follow around naturalist David B. Williams as he points out examples of stone architecture built out of granite, sandstone, and other rocks as old as 3.5 billion years. All participants need bring is a sense of wonder—and maybe a magnifying glass to get an up-close look at some of the stones.

  • Downtown Walking Tour
    Follow naturalist David B. Williams on a 1.5-mile walk as he discusses the geology behind the ancient rocks that make up the stone architecture of downtown Seattle.

  • Learn the History of Ancient Stones
    David points out stone and fossils from different geological periods, ranging from 120,000 to 3.5 billion years ago.


Your Host

David Williams David B. Williams
Author and Naturalist

After moving from Utah to Boston, geologist David B. Williams longed for the red rocks of the American west. That is until he discovered ancient sandstone, fossils, and other geological treasures hidden right in the city’s stone buildings. Since then, the naturalist has lectured on the geological history of building stone, authored numerous books on the subject, and led Stories in Stone building tours for two decades.


  1. A

    Central Business District

    1st Ave. & Madison St.

    Seattle, WA 98104

    Get Directions

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