Among the thousands of single-coned trulli in Alberobello, one stands out for a different reason: two cones growing from a single structure, side by side, like a trullo that couldn't make up its mind. Locals call it the Siamese trullo. It is an oddity even in this town of oddities, a place where architectural rules are already being broken.
No one is entirely certain whether it arose from two adjoining trulli merged over time or was built that way from the start. Either way, it serves as a good reminder that these buildings were not the products of a rigid vernacular style but of practical people solving practical problems, occasionally with results that surprise even their neighbours.