Compiled this short video of our bike ride to Phu Thap Boek. We took highway 21 from Bangkok and got on to 2331. Excellent views and lots of switchbacks on the way up. And on the way back we came via Phitsanulok thru the national park. Thoroughly enjoyed riding 2331, thanks to Goran for his advise. Plenty of "matchbox" style resorts there, unfortunately most of them are absolute junk. I liked a place which we visited but didn't stay. I have mentioned at the 3:42 of the clip. I would recommend watching the link on full screen and high def to really admire the landscapes. C&C welcome.