There are 5 identified tunnels in Tagoloan, which are believed to have been used during World War II.
According to the locals, these tunnels were allegedly used by the early Tagoloanons as hideouts to protect themselves from Japanese soldiers.
The 5 tunnels were recorded in Barangay Natumolan, namely:
U Tunnel, Tunnel #2, Skull Tunnel, Nanay Tunnel, and Nagangga Tunnel. (Source)