This $3.50 airmail stamp from Colombia, issued in 1978, depicts the mysterious Ciudad Perdida, or “Lost City,” an ancient archaeological site hidden deep in the Sierra Nevada de Santa Marta mountains. The intricate stone terraces and stairways, shown in earthy tones, evoke the grandeur of this pre-Columbian Tayrona civilization. The bold green inscriptions “COLOMBIA Aéreo” and “Ciudad Perdida” highlight both the national pride and the archaeological significance of this discovery, made only a few years earlier in 1976. A beautiful tribute to Colombia’s indigenous heritage and historical preservation.