Prasat Ban Prang is a significant archaeological site located in the heart of Ban Prang sub-district, Khong district, Nakhon Ratchasima province. Its antiquity dates back to the zenith of the Khmer Empire, estimated to have been constructed around the 17th-18th Buddhist Century (approximately the 12th-13th century CE). This places its artistic style in the transitional period between the late Baphuon and early Angkor Wat styles. It is hypothesized to have been associated with the construction of Arokayasala (hospital chapels) or Dharmasala (rest houses) during the reign of King Jayavarman VII, the great monarch of the Khmer Empire.

The original complex comprised three main prang (towers) constructed from brick and laterite, aligned along a north-south axis. Currently, only the foundation and scattered remains of the central tower are visible, its structure having collapsed over time. The remaining structure primarily consists of a laterite and sandstone base, clearly outlining the floor plan of the Garbhagriha (the sanctum sanctorum), where religious images related to Hinduism or Mahayana Buddhism were once enshrined.

A distinct feature that makes Prasat Ban Prang exceptionally notable is the evidence of ancient astronomical knowledge found at the site. Archaeologists and astronomy experts have determined that the orientation of this temple was precisely calibrated, not merely adhering to general religious principles. The structure faces the true east (azimuth 90 degrees), an alignment that corresponds exactly to the phenomenon of the vernal equinox (the day when daylight and nighttime are equal, around March 20-21 each year). Furthermore, remnants of straight lines scored onto the sandstone floor are believed to be markers used for observing this crucial astronomical event. This demonstrates the profound wisdom of the ancient artisans and priests who seamlessly integrated architecture with cosmology.

In line with Khmer tradition, a large Baray (ancient reservoir) was constructed adjacent to the temple. The baray was vital for the Khmer civilization's water management system and was essential for associated religious rituals. Thus, Prasat Ban Prang is more than just an ancient ruin; it was a religious, administrative, and existential center for the community in the past.

The site is currently under the custodianship of the Fine Arts Department and serves as the central focal point for the Ban Prang Nakhon Community Tourism group. This community actively works to preserve and present the history of the ancient ruins alongside local ways of life and cultural activities, allowing visitors to experience both the grandeur of the past and the charming essence of the contemporary Isaan community.

• Private Car: Travel via Highway 2 (Mittraphap Road) towards Khong District, Nakhon Ratchasima Province. The castle is located in the Ban Prang community.

• Local Transportation: Contact the Ban Prang Nakhon Community Tourism Enterprise Group for a guided tricycle tour around the community.

• Best time to visit: If you're interested in astronomical phenomena, visit around the vernal equinox (around March 20-21), as special community events may be held.

• Etiquette: As this is an ancient and religious site, dress appropriately.

• Extra Activities: Try participating in community activities, such as making "Heavenly Eyes" or tasting the community's small, chewy noodles (Korat noodles).

Admission Fees:

• No Admission Fees.

Opening Hours:

• Opening Hours: As a small historical site located in a community area, opening hours are flexible and not fixed like those of larger historical parks.

• Recommendation: Generally, it is recommended to visit during the daytime or during normal government or community office hours, which are approximately 8:00 AM - 5:00 PM (hours may vary).