More than 1,600 trulli fill Alberobello, Italy — and their most surprising feature is what they don’t have: mortar. Built from local limestone stacked by hand, these cone-roofed houses could, according to local tradition, be dismantled and rebuilt — a clever way to avoid being counted as permanent taxable homes.

 More than 1,600 trulli fill Alberobello, Italy — and their most surprising feature is what they don’t have: mortar. Built from local limestone stacked by hand, these cone-roofed houses could, according to local tradition, be dismantled and rebuilt — a clever way to avoid being counted as permanent taxable homes.
More than 1,600 trulli fill Alberobello, Italy — and their most surprising feature is what they don’t have: mortar. Built from local limestone stacked by hand, these cone-roofed houses could, according to local tradition, be dismantled and rebuilt — a clever way to avoid being counted as permanent taxable homes.