Sun Lakes-Dry Falls State Park, located in the state of Washington, offers visitors a unique and captivating natural landscape. With its diverse geological features, including the remnants of a massive waterfall, this park has something to offer for everyone. Here is a summary of its key attractions, interesting facts, and the best time of year to visit.

Reasons to Visit:
1. Geological Wonder: The park showcases the remarkable remnants of the ancient Dry Falls waterfall, which was once the largest waterfall on Earth, surpassing even Niagara Falls in size.
2. Scenic Beauty: Visitors can marvel at the picturesque landscapes, including deep coulees, sheer cliffs, and stunning basalt formations.
3. Outdoor Recreation: Sun Lakes-Dry Falls State Park offers a range of recreational activities such as hiking, fishing, boating, camping, and wildlife viewing, making it an ideal destination for outdoor enthusiasts.

Points of Interest:
1. Dry Falls Interpretive Center: This educational center provides insights into the geological history, showcasing exhibits and displays that explain the formation of the Dry Falls and the unique landscape.
2. Dry Falls Viewpoint: A must-visit spot, the viewpoint allows visitors to witness the breathtaking panorama of the immense Dry Falls and the surrounding coulees, providing excellent photo opportunities.
3. Sun Lakes: The park is home to a series of interconnected lakes, collectively known as Sun Lakes. These lakes offer opportunities for swimming, boating, and fishing.

Interesting Facts:
1. The Dry Falls once carried water more than ten times the flow of all the modern-day rivers combined.
2. The falls were formed around 10,000 to 20,000 years ago during the last Ice Age when massive ice dams holding back ancient Lake Missoula broke, resulting in a catastrophic flood that carved out the unique landscape.
3. The park is a part of the Ice Age Floods National Geologic Trail, designated by the National Park Service, which traces the path of the cataclysmic Ice Age floods that shaped the landscape of the Pacific Northwest.

Best Time to Visit:
The ideal time to visit Sun Lakes-Dry Falls State Park is during the late spring to early fall. Summer months offer pleasant weather for outdoor activities and the opportunity to enjoy water-based recreation. Spring brings beautiful wildflowers, while fall offers stunning foliage colors, making it a picturesque time to explore the park.

Note: It is always recommended to verify details regarding visiting hours, accessibility, and current park conditions by referring to official sources such as the Washington State Parks and Recreation Commission and the National Park Service.