We spent a few days exploring Bangkok. The temples are amazing. A great way to see a lot of the city would be walking down to the river and taking one of the tour boats. This allows you to wander around and get on and off as reguired.
Thailand is primarily a buddist nation, and there are shrines to Hindu deities. One seen and easily recognisable is Ganesh (Ganesha), the elephant-headed god usually referred to in Thai as Phra Phikanet. Ganesh is known as the remover of obstacles and Thai Buddhists make an offering to a Ganesh shrine when starting out on a new venture.