Wat Arun,
Right opp frame up Wat Rakhang *Tha Chang ,Tha Phra Chang*.......
Yaowaraj during evening time(beware of heavy traffic and speedy motorcyclists.)
king rama 5 monument
Wat Mahabut-> Nang Nak Shrine
Baiyoke is good..but the turning of the top might be extremely windy..good spot during night..beware the glaring lighting behind you
Wat Hualampong (temple & also visit the train station of Hualampong)
Wat Nok
Octave Rooftop Lounge
Khao san( lucky u might see some oversea celebrities ..esp from Japan )
Phratunam during peak hours...2-3 overhead bridges got nice spots...
Many many just to come...depending on what u wanna wor..
Night Scene,people,temple,traffics,buildings...
If taking a day tour or hire a driver up to Ayutthaya:-
The Royal Palace Ruins
Phra Mongkon Bophit