Packed with extraordinary art and architecture, Sicily’s south east coast corner is an ideal retreat at any time of the year. Try to find time for a few beach visits if you’re holidaying here in the heat of the summer but our guess is that at any time, you may still struggle to squeeze in everything there is to see in this unique region. If ever you needed an example of a silver lining to a natural disaster, the eight towns in the Val di Noto, a combined UNESCO site, are the perfect illustration. Flattened by an earthquake in 1693,…