Is this small passage worded in the proper way?

Once they killed the monsters, the group traveled deeper into the cavern and discovered a large underground city. However, upon seeing the city, which consisted of buildings that looked like ones found above ground and not under it, Drizzt and his companions doubted that it was actually Gauntlgrym. Following a vicious battle against two monsters from the Plane of Shadow, the group entered a massive structure and found extraordinary statues and tapestries of orcs and dwarves dwelling together in peace.