Trip to Castleton Gardens, St. Mary

I don't go out as often as I feel I should, because of my professional life. However, on May 26, 2018, some of my coworkers and I will visit Castleton Gardens in St. Mary. Honestly, I've never been to Castleton before, or St. Mary for that matter, but I'm definitely looking forward to the experience. 

I heard they have a beautiful river there, and that's the main attraction for me cause I'm a good swimmer. After my visit, I will definitely post some pics and a review of the venue.

Have any of you been to Castleton before? What interesting things do you know about the parish of St. Mary? Let me know in the comments.