Many thanks William Guillermo Romero for this nice archeological cover, featuring archeological sites in El Salvador ;-))) This cover took 25 days to reach Singapore.
From top L - R :
1. Joya de Cerén - a pre-Columbian Maya farming village preserved remarkably intact under layers of volcanic ash
2. Tazumal - a Pre-Columbian Maya archeological site in Chalchuapa, El Salvador. Tazumal means, "the place where the victims were burned," in K'iche'.
3. San Andrés - a pre-Hispanic site of El Salvador. Between 600 and 900 AD, San Andrés was the capital of a Mayan lordship with supremacy over the other establishments of Vale de Zapotitán.
4. Statue of Terracota in Chalchuapa