Unusual buildings in a post-apocalypse village/town?

[Matt W]

I'm trying to think of "unusual" buildings that would illustrate the changes resulting from TEOTWAWKI

So far, I'm thinking of the following structures

Dovecote. This does 3 things.

• control the population of local feral pigeons (so they don't eat the crops).
• meat(young "squabs" not eggs, pigeons breed several times a year)
• guano (fertilizer and saltpeter)

Brewery/distillery
You cannnot drink the water! There has to be a source of safe liquids

Watchtower

Any more ideas?