The best way to explore Bangkok is pier hopping! It's really cool to go across Chaophraya river by boat, feeling the tropical wind. There are many piers(tha) along the river, and each pier(tha) has its own style. The most popular tourist sights are located between Central Pier to 13th pier(Tha Phra Athit) , but my favorite is 15th pier(Tha Thewet). The 15th pier has a lovely flower market, and you can feed fish while waiting for your boat. Fun! I lived in Dusit district. My apartment was on Suan Ooy street(in the upper left corner). I miss the yummy street food in that neighborhood!