The HDRI measures 9000 x 4500 pixels (equirectangular) and is saved as an EXR-image to be used as an environment map. It shows the dunes near Henne Strand in Denmark (55°44'6.41"N, 8°10'17.38"E).

A simple example render with the EXR as the environment map. Free sample: JPG with 3000x1500 px