A giant sinkhole appeared in downtown Guatemala City, Guatemala on May 30. It’s about 60 feet (18 meters) wide, and appears to be 30 stories deep! Scientists think that tropical storm Agatha caused the sinkhole to form, although one geologist believes that it may have been because of leaky pipes.

Guatemala City is built on ground known as pumice fill that came from many past volcanic eruptions. Water soaked the loose, gravelly ground particles under the topsoil and the particles shifted causing the top layer to collapse.

See pictures and learn more about the giant sinkhole on National Geographic News.

Get facts about Guatemala on National Geographic Kids.

What’s it like to live in Guatemala? Read Keli’s blog and find out.

Photograph by Daniel LeClair, Reuters