Within the room, cave explorers discovered bracelets sitting atop stalagmites and other artifacts from a lost civilization. The motif on the shell bracelets traces to the extinct Tlacotepehuas ethnic group, about which relatively little is known. A mapping expedition in the Tlayócoc cave in Mexico led a professional cave explorer to a hidden chamber containing shocking evidence of an extinct civilization. Yekaterina Katiya Pavlova ventured to a community in the Sierra de Guerrero to further map the Tlayócoc cave. The explorers also found another bracelet, a giant snail shell, and pieces of black stone discs similar to pyrite mirrors—all of it dated to more than 500 years ago.