Discovery at Lake Titicaca

An underwater reef where stone boxes containing miniature figurines of gold, silver and shell were submerged as ritual offerings was discovered. Typically the blood of children or animals would be included with these items after the sacrament was prepared to the offering.

Further Reading,

https://www.cambridge.org/core/journals/antiquity/article/context-and-meaning-of-an-intact-inca-underwater-offering-from-lake-titicaca/AD2AAA3D95C2CB5551E2E02F8EA0AD11