The entrance to "Wat San Paulo" is located along a city road in Lopburi, with clear signage leading into the peaceful historic site. Upon entering, a path unfolds towards the orange-red brick ruins that stand majestically amidst a wide, green lawn. The surrounding entrance area is landscaped to be open, allowing visitors to view the iconic octagonal tower from a distance. The atmosphere is simple yet mystical, with old wall remnants acting as a boundary between the modern city and historical traces. It serves as the starting point for visitors to experience the grandeur of Siam’s first observatory through the site's prevailing tranquility.