Marquis Los Cabos Resort & Spa (San José del Cabo, Mexico)

Infinity pools seem to flow right into the sea at the Marquis Los Cabos. There’s something for every couple at this all-inclusive, adults-only resort, built along a picturesque stretch of coastline on the emerald-blue Sea of Cortez. Its never-ending menu of couples-friendly diversions includes dance lessons, tequila tastings and his-and-hers massages at the 13,000-square-foot Spa Marquis.