Wapping Tunnel Ventilation Shafts

Looks like you’ve stumbled on one of these weird brick towers. What is it you ask?

First thing’s first, Well done! You are currently standing over Liverpool’s Wapping tunnel.

Wapping Tunnel (1833) https://en.wikipedia.org/wiki/Wapping_Tunnel

That weird thing you’re looking at is one of three ventilation towers to the tunnel which once connected the Liverpool-Manchester Railway to Liverpool’s Docks. You are standing on the former center of global trade. 

Wapping tunnel

Why don’t you find the other two and figure out the tunnel’s path through Liverpool? 

https://en.wikipedia.org/wiki/Wapping_Tunnel