You can visit the temples thru MRT or boat ride . Make sure your hands and knees are covered , you’ll be provided with gowns in case you forget. But definitely would suggest wearing dresses. Grand palace there was no entry fee and Wat Arun was 100 baht . But we got in Wat Arun for free ( long story short we walked around the temple simple and saw an entrance behind we got in saw the temple left then figured out we had to pay from front lol) There are a lot of foreigners so it would be difficult to get a picture easily like you are in the video . Loved the architecture and how bling bling the temple was .