Mayan entrance in the caves of Xcaret, Riviera Maya, Mexico https://www.nationalgeographic.com/culture/article/maya-ritual-balamku-cave-stuns-archaeologists?fbclid=IwAR1EZwSWygkGyvHqSqku0QaWSb6sHabIVNdPCF6bJFgedrJjylTRW1yQ9qU