A fountain jets skyward in the foreground as a row of colorful international flags ripples in the Caribbean breeze outside San Juan's International Airport Hotel — a sleek, mid-century modern tower that put travelers mere steps from their gate at the brand-new Isla Verde Airport. The chrome-era color photograph captures the hotel's white concrete façade rising six stories, its rooftop bristling with antennas and a distinctive dome, while a mix of vintage early-1960s automobiles — sedans, a yellow van, and white wagons — line the covered drop-off below. Operated by Executive House, Inc., this property was marketed squarely at the jet-set layover crowd during Puerto Rico's postwar tourism boom, when Isla Verde was rapidly displacing the older Isla Grande facility as San Juan's gateway to the world. The flags on display hint at the hotel's cosmopolitan clientele, airlines converging from across the Americas and Europe on what was becoming one of the busiest hubs in the Caribbean.