[Photo from bangkoktourist.com]

Visit Bangkok National Museum where national antique are collected. You can enjoy the art exhibition at the National Art Gallery (Chao Fa Road). The building is constructed in western style and used to be the mint industry during King Chulalongkorn era. You can enjoy a local menu at The Pra Chan, then take the ferry across the Chao Phraya River to The Wandlhung (Siriraj) and visit Siriraj Medical Museum in Adulyadejwigrom building of Siriraj hospital. Finish your day with a romantic dinner at Chaophraya riverside restaurants.