Erawan museum’s landmark is the elehphant statue with 3 heads.
It is located in the Samut Prakan area.
It takes about 1hour from Bangkok.
Muangboran, the Ancient City tourist destination, is nearby.
When I went to there, I took free shuttle bus going to Muangboran the Ancient City from BTS Bearing station.
On the way they stop at Erawan museum.