Nicest beach escape near Bangkok!

Needing a 'breather' from daily living in Bangkok we drove a few hours South to beautiful Huai Yang area. The beach was incredible, the villa fantastic and the nearby National park too (even the somewhat mediocre Aquarium tour was fun;)  In fact all along that stretch of coast from Prachuap Khiri Khan (PKK:) down to Bang Saphan and Chumpon are some of the nicest yet less visited beaches in all Thailand. Plus all round PKK area from Dolphin Bay to Ban Krut area is surrounded by gorgeous National Parks as well. This entire area easily tops my fav go-to 'escapes' (actually feel a touch guilty showing it off! )

Appears the Villa is well booked but if looking ahead see:
https://www.airbnb.com/rooms/8004393

There's also several other options in the area, these under 1000 Baht:
https://tinyurl.com/y3mzlut6

So what's your fav beach within 5 hrs of Bangkok? 

(Khanom/Sichon might top but just a bit too far;)

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Also for an overview of the nearby nicest (imho;) small beach town in Thailand, please see:

Happy sidetrips all and thanks for viewing!  :)