Haunting and monumental, this real-photo postcard peers into the intricate Puuc-style stonework of Las Monjas (The Nunnery) at Chichén Itzá, with the rounded dome of El Caracol — the ancient Maya astronomical observatory — visible in the misty background. Shot under dramatic storm clouds that seem entirely appropriate for a civilization that mapped the cosmos, the photograph renders the zoomorphic Chac masks and geometric friezes with striking clarity. Handwritten in white ink on the face: "Las Monjas y Caracol al Fondo / Ruinas de Chichen-Itza / Merida Yuc." The card was mailed from Mérida, Yucatán, to Sarah in Los Angeles, California, bearing a Mexican 6-centavo stamp depicting a commemorative monument. The lengthy message — written by a traveler captivated by the ruins — recounts the difficulty of reaching the site and the overwhelming impression it made.