It's a logo of a long diagonal line from the upper left to the bottom right. It covers an image of a person scuba diving with their feet in the upper right and their arms in the bottom left with a scuba tank on their back.
Related to No Scuba Diving Icon
Related icons are the icons with matching tags, as well as all city icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors