At Pankuri Barwadih are the megaliths or huge stone observatory used for astronomical purposes. There is a group of megaliths found close to Barkagaon that is about 25 km from the headquarters of the district. The megaliths are arranged in such a manner that two of the most distinguished megaliths create the alignment for the formation of an Equinox point.

On every 21st March and 23rd September, many villagers, tourists and researchers visit this place to observe the Equinoxes. The observation takes place for 30 minutes.  It is also known to offer great views of the sunrise and sunset throughout the annual Solstices. The scientists and researchers, who study the movements of the Sun, verify with these megaliths, as observatories from the prehistoric times.

The observatory can be reached while on the way to Hazaribagh – Barkagaon Road, just in prior to Barkagaon, the megaliths can be seen on the left side of the road.