A bizarre network of brick-arched tunnels burrowed under the Edge Hill area in the early 1800s by an eccentric tobacco merchant named Joseph Williamson, ostensibly to provide work for soldiers returning from the Napoleonic wars. The full extent of the tunnels is still unknown — the centre is gradually clearing and stabilising more of them.
Two separate volunteer organisations run tours of different sections: the Joseph Williamson Society from Mason Street, and the Williamson Tunnels Heritage Centre on Smithdown Lane. The latter is the more developed visitor experience, with a small museum and short guided walks through cleared sections. Both are atmospheric and unusual.