Excellent educational visit. Takes you inside the life of one of the greatest presidents in history. Seeing the struggles he endured and appreciating the love he had for the beautiful Hudson valley.
You can get pretty close to these ruins. It's a good drive out to the site and while you can make it without high clearance vehicle, it will be very slow going. We had a Jeep and it was real easy to get to.
I was on a boat cruise on Perfume river and Hon Chen Temple was a stop. It's good to go with a guide to get better understanding of a culture and place.