Another vote for wallhaven, have found several high quality 5k and 6k+ desktop pictures there, as well as some for odd aspect ratios (e.g. 5k portrait). Its pre

Another vote for wallhaven, have found several high quality 5k and 6k+ desktop pictures there, as well as some for odd aspect ratios (e.g. 5k portrait). Its predecessor Wallbase was also great. One thing I appreciate is that its users do a decent job of tagging images so it’s easy to find all the work of a particular artist or location.