The Bangkok Snake Farm was founded in 1929 and is said to be the 2nd oldest snake farm in the world. It’s located at the Queen Saovabha Memorial Institute (At the corner of Henri Dunant Rd and Rama IV) where there are shows daily demonstrating venom extraction and snake handling. The venom is then used for research aimed at finding antidotes.
Koh Tao is a smaller island in the South of Thailand just north of Koh Samui. Unlike Samui, however, it is more affordable and in my opinion, more interesting. Koh Nangyuan is a quick long boat taxi ride away for beaching, snorkelling, and a hike up top to the view point.