One kilometre out of town on the road to Estellencs, the Torre des Verger is a 1579 talayot (watchtower), an image you'll see on postcards all over the island. It's one of the most crazily sited structures on the island – one step further and it would plunge into the Mediterranean far below.
Climb to the top, fighting off vertigo as you go, and scan the horizon for yachts where sentinels once warned of pirates.