Recommended one day tours

The Royal Grand Palace, the Emerald Buddha Temple, Wat Pho, Golden Buddha Temple, canal tour, ancient city etc.
The Bridge over the River Kwai, the Death Railway, WWII Museums, Tiger Temple, elephant village, etc.

Anthony Bourdain

Damnoensaduak Floating Market, Thaka Floating Market, Amphawa Floating Market etc.
Wat Mahathat, Wat Chai Wattanaram , river boat, Elephant Kraal, Summer Palace etc.
Pattaya beach, Coral Island, Nongnuch Garden, Tiger Zoo, the Sanctuary of Truth etc.
Wine tours, Gran Monte, PB Valley, Secret Art Garden, sun flower fields etc.