Koh Samet... again.

Koh Samet - lovely beaches, water and sand. The island is located on a very convenient distance from Bangkok (2.5h by car + 30 min ferry) making it a perfect starting or ending destination when on longer trips. Unfortunately the island is over exploited, full of trash, pricy and the food in the restaurants adapted to tourist (unless you eat in the village instead).

Lampang.

City of Lampang, a couple of hours (by car) south of Chiang Rai.

Chiang Rai

 Doi Chaing and Pha Mi

..on the border between Myanmar and Thailand. Breathtaking roads and scenery.