I open it in my browser and leave the tab open forever (because I will never come back to it).
I do this too, to a degree, but have you tried bookmarking in your browser more? I have and it's been pretty nice for maintaining this habit without having a tab perpetually open (I write as I have like 10+ tabs perpetually open that I swear I'll get back to eventually).
Honestly any, even if I may never get a chance to visit, I like learning about some of them, particularly ride designs and engineering. (Also for those lurking, this question is mainly inspired by having watched some more Defunctland videos lately.)