The tiny town of Metaline Falls sits nestled up in Pend Oreille County near the Canadian border. And with a population of 245, it’s safe to say most Washingtonians have never been. But if you do happen to make it to that corner of the state, exploring Gardner Cave is a must.
![](https://img-aws.ehowcdn.com/700x/www.onlyinyourstate.com/wp-content/uploads/2019/02/entrance-to-the-cave.jpg)
The park — and the cave — are open from mid-May until early September.
![](https://img-aws.ehowcdn.com/700x/www.onlyinyourstate.com/wp-content/uploads/2019/02/some-cave-formations.jpg)
Its geologic history, of course, goes back much farther.
![](https://img-aws.ehowcdn.com/700x/www.onlyinyourstate.com/wp-content/uploads/2019/02/flowstone.jpg)
The uplift of the Selkirk Mountains caused cracks in the limestone sediment. Later, water seeped into the cavern through the calcium-rich limestone, leading to these unique formations.
![](https://img-aws.ehowcdn.com/700x/www.onlyinyourstate.com/wp-content/uploads/2019/02/photo3jpg-8.jpg)
Make sure to dress warmly, even in the summertime. The cave stays a constant 39 degrees.
![](https://img-aws.ehowcdn.com/700x/www.onlyinyourstate.com/wp-content/uploads/2019/02/Sinkhole-Stairs-22261535196.jpg)
You’ll need a Discover Pass to get into the park.
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