4 Exclusive Vacation Spots for Ultra-Rich: Millionaires/billionaires prefer Monaco, Ibiza, Sardinia, & St. Barts.

4 Exclusive Vacation Spots for Ultra-Rich Beyond Mykonos, Tulum: Tourism is booming again, causing crowds at hotspots like Mykonos and Tulum. The uber-rich prefer exclusivity; these are some places where millionaires and billionaires recharge: Monaco, Ibiza, Sardinia, and St. Barts.