The Temple of the Emerald Buddha (Wat Phra Keo) within the Grand Palace is a sort of national cathedral, housing one of the country's most sacred objects. As such, entry is free to Thais but foreigners must pay an entry fee (200 Baht, about US$5). The temple is enclosed by a cloister like gallery painted with scenes from the Ramakien, the Thai epic based on the Hindu Ramayana.
Immediately south of the Grand Palace lies Wat Jetuphon, commonly known as Wat Po. Its actually the oldest temple in Bangkok, having been established in the 16th century. It was extensively remodeled by the early Chakri kings who made it Bangkok's first center of public education.
On the east bank of the Chaophraya River, the temple pre-dates the founding of Bangkok as the capital. You can reach the temple by ferry from the Tha Thien pier a short walk from Wat Po.
Shots of us riding back from the Hard Rock Cafe in a tuk tuk.