This has a lot of interest, and the number of people riding alone seems like a reason to jump on board, but I'm not sold by the drain cover spotting :p
Tell me subterranean lovers, why would this be a good ride?
Use your imagination. I could get lost in a book but I'm not actually in the fictional world. I enjoy looking at buildings but I rarely get inside cavity walls.
Use your imagination. I could get lost in a book but I'm not actually in the fictional world. I enjoy looking at buildings but I rarely get inside cavity walls.