Where in the Grove Do These Dragonflies Swarm?

Welcome to another edition of 'Where in the Grove?' in which we take a picture, you guess where we took it, and the winner gets a cool prize.

Here, mosaic dragonflies flit across the surface of a mysterious mushroom-shaped structure. What is it? And more to the point, where is it?

Tell us the location and street in Elk Grove where these dragonflies can be found. Leave your guess in the comments. We'll award a Patch water bottle to the first person to guess correctly. Extra points if you can tell us what this tiled masterpiece is used for.

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Got a great, crowd-stumping photo for 'Where in the Grove'? Send it to elkgrove@patch.com.

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