Visit the Bangkok National Museum located just next to Sanam Luang near the Grand Palace.
You can get there easily by taxi, but the far more fun way is to travel along the “River of Kings” by blue-flag tourist boat (50 baht) or orange-flag ordinary boat (14 baht).

The seat of the Uparaja was the Front Palace. This changed in the late 19th century with reform to the rules of succession, and the Front Palace was eventually converted into the Bangkok National Museum. Now, the National Museum houses an impressive collection of Southeast Asian art.

Admission to the museum is 200 baht. A visit to the National Museum is an excellent way to spend an afternoon after a morning sweltering in the heat at the Grand Palace.