Hotel Cala di Volpe

This glittering seaside resort, designed by international playboy Karim Aga Khan IV in 1962 to resemble a rambling fishing village, is the ultimate address on the Costa Smeralda, a jet-set destination on the northeast coast of Sardinia. Staying at this more-than-$1,000-a-night property during the island’s summer high season is like jumping into a Ferrari wearing Prada from head to toe; you’re telling the world you’ve made it, Italian style. European luminaries like Princess Caroline of Monaco have been known to sail into the property for lunch, while other boldface names (paging Diddy) are content to set anchor offshore.