Stop for a picnic lunch at the Crawford State Park Heritage Site, a lovely 40-acre day-use park that is anchored around stunning Gardner Cave, originally hailed as one of the Pacific Northwest's great natural wonders when it was first surveyed in 1911. The cave, which is one of Washington State's longest caves, stretches for approximately 2,072 feet in length and runs 295 feet across. Inside the cave, visitors can observe one of the Pacific Northwest's most unique cavern landscapes, home to impressive stalagmites, stalactites, rimstone pools, and flowstone. Guided tours are available for up to 25 participants, detailing the history and geology of the 500-million-year-old cavern. 10 day-use picnic sites are offered at the park near the cave's entrance, including sites along the United States-Canada border.

10381 Boundary Rd, Metaline Falls, WA 99152, Phone: 509-446-4065

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