This is again an example of a hotel which can be cheapest booked at internet sites. Some guidebooks list this under Vegetarian restaurants, but they have meat dishes as well. If you want to have a splurge, f.i. for your last night or for some special occasion, then go to the BBQ buffet of the Oriental Hotel . This is of course an absolute must. Opening hours 8.30 am till 5 pm.
Decent dress is required.
There are free guided tours in English at 10 and 10.30 am, and at 1.30 and 2 pm. If you didn't have breakfast yet, there are some restaurants around the entrance. I wasn't really impressed with the Wat Arun. I think that especially the sight from the other side of the river is quite nice, especially at sunset. To get there, simply take a ferry close to the entrance of Wat Po, it costs 2 Bht.