Heavy rainfall caused the mineral-rich shores of Silver and Red Beach on Iran’s Hormuz Island to flood with blood-red water, startling tourists.

The phenomenon, caused by high iron oxide in the volcanic soil, occurs year-round and is a major attraction.

The soil, known as “gelack,” is used in industry and local cuisine, the U.S. Sun has reported.

Similar natural wonders exist worldwide, including Spain’s pink lake and the UK’s glowing blue plankton.

Written by B.C. Begley