The way up takes around 3 hours, it goes through the dense forest most of the time. The temperature goes down the higher you hike. One of the nicest hikes in Thailand.
The hike takes roughly 4 hours to go up and 3h to go down. It'd be also great to stay the night at the top to enjoy the stunning views with the sun setting and rising.
Another beautiful garden here. The villa itself is well maintained and nice,every part of it looks quite expensive and valuable. It's a quick visit though, you just walk around, see the house, the gardens and that's it.