Diocletian's Palace, Split
Concierge.com's insider take:
Since visitors usually make a beeline for the islands, Split is overlooked as a destination. A pity: Croatia's second city is home to this 416,000-square-foot retirement villa Roman Emperor Diocletian built for himself in 305 AD. Today, the Palace is a living monument—a walled city home to 3,000 residents, reams of cafes, bistros, boutiques, and even a hotel. It's a surreal intermingling of past and present: The very same pieces Diocletian used to decorate his villa—such as the Egyptian sphinxes, which look down serenely from pedestals—still adorn the place. Kids play soccer alongside monuments like the Cathedral of Sveti Duje (Saint Domnius) and the Baptistery of St. John (Jupiter's Temple, in Diocletian's time). You realize that the Croatians not only take their history seriously, they still live in it.