Chrome-era color postcard of Balmorhea State Park in west Texas, billed as the world's largest swimming pool — a vast natural spring-fed pool set in a park-like landscape of shade trees, green lawns, and walking paths. A pier or dock structure extends into the clear water at left, with small figures visible at the water's edge. The enormous scale of the pool is conveyed by the wide-angle view across its surface. The sky is vivid blue with white cumulus clouds typical of Chihuahuan Desert light.

• Caption: WORLD'S LARGEST SWIMMING POOL / WORLD'S LARGEST SWIMMING POOL / BALMORHEA STATE PARK
• Card no.: 1194
• Publisher: Schaaf Post Card Co., Alamogordo, New Mexico; Color Photo by F. J. Schaaf; © 1970
• Status: Unposted