Not sure which place in particular. Most of the locations are in Chiang Mai.
Here's the list from the end credit:
- Montfort College, Chiang Mai
- Get Zleep Hotel, Chiang Mai
- Christian German School, Chiang Mai
- Someone's home.... I can't find it on google. Probably Love's house
- Chiang Mai Ram Hospital, Chiang Mai
- Lotus Pang Suan Kaew Hotel, Chiang Mai
- Think Park, Chiang Mai
- Eastin Tan Residence, Chiang Mai
- Dom Cafe, Chiang Mai
- Ban Wat Chan Pine Forest, Chiang Mai
- Apura (not sure where)
- Palm Spring Hotel and City Resort, Chiang Mai
- Palm Springs Place, Chiang Mai
- Phoenix Adventure Park, Chiang Mai
- Eagle Track Zipline, Chiang Mai
- Phutthamonthon Park, Nakhon Pathom
-KBank Siam Pic-Ganesha Theatre, Bangkok (The place where they did the VR thing in the final round)
- Judo Association of Thailand, Bangkok
So yeah, help yourself with google.