Unfortunately, there is an error in the question as Henderson Beach State Park is actually located in Florida, not Kentucky. Here is the requested summary for Henderson Beach State Park in Florida:

Henderson Beach State Park is a popular destination for nature lovers and beach-goers in Florida. The park features over 6,000 feet of pristine white sand beaches and emerald green waters. Some good reasons to visit the park include swimming, sunbathing, fishing, hiking, and birdwatching. The park also offers picnic areas, camping sites, and nature trails.

One of the main points of interest in Henderson Beach State Park is the sand dunes ecosystem, which is protected as a natural preserve. Visitors can observe the different plant and animal species that inhabit this unique environment. Another interesting feature is the coastal scrub, a rare type of vegetation found in the park.

Interesting facts about the park include its history as a military training ground during World War II and its designation as a state park in 1991. The park was named after the Henderson family, who owned the land before it became a state park.

The best time of year to visit Henderson Beach State Park is during the spring and fall when the weather is mild and the crowds are smaller. Summers can be hot and humid, and the park can get crowded during peak season.

Sources:
- Florida State Parks. "Henderson Beach State Park." https://www.floridastateparks.org/parks-and-trails/henderson-beach-state-park
- Tripadvisor. "Henderson Beach State Park." https://www.tripadvisor.com/Attraction_Review-g34182-d266692-Reviews-Henderson_Beach_State_Park-Destin_Florida.html