In the end, the group had to walk for two hours before they found the last part of the dungeon. The structure wasn't that big, but the fact that it had many bifurcations and that they had to wait for the Golems whenever they didn't know what to do delayed their progress a little bit. Basically, the group fought for fifty seconds and then advanced for more than fifty seconds.
"Finally… I am dizzy since everything looks the same inside the dungeon," Lana said.