Dakataua
Dakataua lake on the north tip of the Willaumez Peninsula, left of the Pago volcano. On the right there is a steam plume over the sea from the Ulawun volcano.
Highest point
Elevation	400 m (1,300 ft)
Coordinates	5°3′20″S 150°6′30″E / 5.05556°S 150.10833°E / -5.05556; 150.10833
Geography
Dakataua New Britain, Papua New Guinea
Geology
Mountain type	Stratovolcano
Volcanic arc	Bismarck volcanic arc
Last eruption	1895 ± 5 years

The Dakataua Caldera is located at the northern tip of the Willaumez Peninsula, New Britain, Papua New Guinea. The peninsula includes the 350 m high andesitic Mount Makalia stratovolcano.^[1] The last major collapse of Dakataua was during the Holocene around 800 CE.^[2] The most recent eruption on the caldera's rim was Mount Makalia in 1890, producing lava flows and cinder cones.^[3]

Dakataua's caldera lake is about 76 m above sea level; it has a total surface area of 48 km² (19 sq mi) and a maximum depth of approximately 120 m.^[4] It is horseshoe shaped, roughly bisected by a peninsula.^[1] It is a freshwater lake that is alkaline with a pH of up to 8.2. It is presumed to be formed by rainwater gradually filling in the caldera.^[5] While the lake supports various kinds of life, it does not support any species of fish.^[6]

There is a folk legend that a monster called the migo (or masali) inhabits the lake. In 1993 a Japanese film crew led by Tetsuo Nagata captured what they claimed to be the migo on film. It is presumed that the creature in the video is actually a saltwater crocodile from the ocean surrounding the lake.^[7]