We visited California's "Old Faithful" Geyser in Calistoga, CA.

Canon PowerShot SD30, 2007:11:23 15:54:29 -- 1/160 sec, f/4.5.  No Flash, Auto.2592x1944 Auto. Large -- Medium

Chet, Dave, Don, Cheryl Rae, and Jason wait for the geyser. Grandma (Gladys) is sitting at a table in the shade -- you can see her just to the right of Cheryl Rae.
Canon PowerShot SD30, 2007:11:23 15:59:01 -- 1/320 sec, f/5.4.  No Flash, Auto.2592x1944 Auto. Large -- Medium

The geyser is supposed to spout out of these rocks in the middle of this pond.
Canon PowerShot SD30, 2007:11:23 16:24:16 -- 1/400 sec, f/3.2.  Flash, Compulsory.2592x1944 On. Large -- Medium

Jason, Gladys, and Cheryl Rae at another table.
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The geyser did a lot of this steaming business while we were waiting.
Canon PowerShot SD30, 2007:11:23 16:24:39 -- 1/200 sec, f/3.2.  Flash, Compulsory.2592x1944 On. Large -- Medium

The geyser is supposed to erupt every 30 minutes. Here are Dave and Chet, waiting.
Canon PowerShot SD30, 2007:11:23 16:25:14 -- 1/100 sec, f/3.2.  Flash, Compulsory.2592x1944 On. Large -- Medium

Dave and Gwen, still waiting after about 45 minutes.
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Here's a movie of the geyser gurgling prior to starting up.
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And here it is really starting to get going.
Canon PowerShot SD30, 2007:11:23 16:38:33 -- 1/200 sec, f/6.3.  No Flash, Auto, Red-Eye Reduce.2592x1944 Red-Eye Reduction (Auto). Large -- Medium

Finally! It took the geyser about 1 hour 5 minutes to erupt this time.
Canon PowerShot SD30, 2007:11:23 16:40:33 -- 1/250 sec, f/6.3.  No Flash, Auto, Red-Eye Reduce.2592x1944 Red-Eye Reduction (Auto). Large -- Medium

Dave and Chet watch the geyser.
Canon PowerShot SD30, 2007:11:23 16:42:02 -- 1/250 sec, f/6.3.  No Flash, Auto, Red-Eye Reduce.2592x1944 Red-Eye Reduction (Auto). Large -- Medium

It went on for about 5 minutes. Here are Cheryl Rae, Dave, and Chet.
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It went really strong like this for quite a while.
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A movie of the its last gasps.
Canon PowerShot SD30, 2007:11:23 16:46:33 -- 1/500 sec, f/3.2.  No Flash, Auto, Red-Eye Reduce.2592x1944 Red-Eye Reduction (Auto). Large -- Medium

Finally it spluttered out.
Canon PowerShot SD30, 2007:11:23 16:53:49 -- 1/160 sec, f/3.2.  Flash, Compulsory.2592x1944 On. Large -- Medium

Here's an after shot of Chet and Jason.