Sunlight bounces off the crinkled concrete latticework of Hotel La Concha's iconic mid-century façade in this chrome-era postcard — the tower's scalloped balconies stack up eleven floors above a lushly planted pool terrace, its wave-form canopy sheltering the cabana club below while the luminous Caribbean glitters beyond the roofline, all of it captured in the saturated palette that made Chrome-era resort cards irresistible souvenirs. La Concha (Spanish for "The Shell"), designed by architect Héctor Arce Reverón and opened in 1958 on the Condado beachfront in San Juan, became one of Puerto Rico's most celebrated mid-century modern landmarks, its undulating shell-motif architecture a literal translation of its name into reinforced concrete — and a magnet for the jetset tourism that boomed on the island through the 1960s. The back copy describes it as sitting "on the Gold Coast at the ocean's edge in the most beautiful residential section of San Juan," promising luxury "exceeded only by the warmth of its hospitality." This card is unused and unaddressed, in excellent condition with vivid color and minimal aging.