Describe a scene in which a character is exploring a mysterious underground tunnel

Describe a scene in which a character is exploring a mysterious underground tunnel. The character can hear echoes of their footsteps and see flickering shadows on the walls, as they navigate through the dimly lit passageway. Suddenly, they encounter a fork in the tunnel and must make a decision on which direction to go. The air is thick with an unknown scent, adding to the eerie atmosphere of the underground labyrinth. As the character continues to explore, they come across strange symbols etched into the walls and eerie whispers that seem to follow them wherever they go. The tension builds as the character delves deeper into the tunnel, unsure of what they will discover next.