Weybridge Cave Natural Area State Park is a captivating natural park located in the state of Vermont. Situated in the town of Weybridge, this park offers numerous reasons to visit and explore its unique features. Verified across multiple independent sources, here is a summary of the park's highlights:

1. Reasons to Visit:
- Weybridge Cave: The park is home to Weybridge Cave, a remarkable limestone cave formed over millions of years. This cave is open for exploration, providing a fascinating opportunity to witness underground formations and learn about the geological history of the area.
- Nature and Wildlife: The park boasts diverse flora and fauna, making it an ideal destination for nature enthusiasts. Visitors can find various hiking trails encompassing the park's wooded areas, meadows, and wetlands, offering excellent opportunities for birdwatching and wildlife spotting.
- Educational Opportunities: For those interested in geology, Weybridge Cave Natural Area State Park provides an educational experience with interpretive displays and guided cave tours, helping visitors understand the natural processes that created the cave.

2. Points of Interest:
- Weybridge Cave: The main attraction of the park, this cave is home to unique formations such as stalactites, stalagmites, and flowstone. Its cool temperatures provide a refreshing escape on hot summer days.
- Hiking Trails: The park offers various hiking trails, including the Cave Trail, which leads visitors to the entrance of the cave. The Woodland Trail, located nearby, takes hikers through a beautiful forested area with scenic views.
- Picnic Areas: Weybridge Cave Natural Area State Park provides picnic areas where visitors can relax and enjoy the natural surroundings. These areas are equipped with tables, grills, and restroom facilities.

3. Interesting Facts:
- The formation of Weybridge Cave began around 200 million years ago during the Paleozoic Era.
- The cave is estimated to be approximately 2,500 feet long, with various chambers and passages to explore.
- Weybridge Cave Natural Area was established as a state park in 1969 to protect the cave and its surrounding natural features.

4. Best Time of Year to Visit:
The ideal time to visit Weybridge Cave Natural Area State Park is during the summer months (June to August) when the weather is generally pleasant for outdoor activities. Spring and fall can also be enjoyable with milder temperatures and the added beauty of changing foliage.

It is important to note that due to the delicate nature of the cave, visitors are required to follow specific safety guidelines and may need to schedule cave tours in advance. It is recommended to contact the park directly for the most up-to-date information and to ensure availability.