https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/4022665
A limestone landscape.
Limestone is one of the most common sedimentary rocks found in New Zealand. Eye-catching features such as caves, sinkholes and spectacular skyline landscapes are often associated with limestone formations. These landforms have developed through the interaction of rocks, water and climate. Original public domain image from Flickr
Public DomainFree CC0 image for Personal and Business use