Have a look at this impressive digital environment created by Subash Chander Marappan.
Subash Chander Marappan, a skilled Environment and Prop Artist, has showcased Abandoned Staircase, a highly-realistic real-time 3D scene depicting an old and decrepit, yet still aesthetically pleasing and atmospheric stairwell.
According to the author, the environment in question was set up as a personal project in Unreal Engine 5, with the goal being to learn more about environment art workflows and improve the skills. Besides UE5, the artist also employed Maya, ZBrush, Substance 3D Painter/Designer, RizomUV, Photoshop, Marmoset Toolbag, and Quixel's assets and decals to create the level.
And here are some behind-the-scenes shots shared by the author. You can learn more about the project and see more WiP renders by visiting Subash's ArtStation page:
If you would like to learn more about creating awesome 3D environments with Unreal Engine 5, here are some great tutorials that might help you out: