Underwater archaeologists excavating Lake Titicaca in Bolivia, South America, have been uncovering artifacts like this bowl. The finds offer clues to a long-vanished culture.

Recently, a group working on Khoa Reef at the lake have uncovered a number of ritual offerings, including ceramic puma shaped incense burners, the remains of sacrificial llamas, and ornaments made of shell, gold and stone.

The reef is located near the Isla del Sol (Island of the Sun), an important religious site