The entrance area of Wat San Paulo is designed to be open, offering a complete view of the iconic octagonal tower at its center. The main path leads visitors from the modern street into a historical zone surrounded by old brick walls and well-kept lawns. Near the entrance, historical information boards in both Thai and English provide a background on the first observatory in Siam. The surrounding atmosphere is tranquil, secluded from the city noise, allowing for a clear view of the building's structural foundations. It serves as a transition from the contemporary city into a site dedicated to the astronomical sciences that flourished under King Narai.