At least according to this website.

The list is:-

Phantastes by George MacDonald
Masters of Atlantis by Charles Portis
Looking for the General by Warren Miller
Doom by William Gerhardie
That Hideous Strength by C.S. Lewis
Lud in the Mist by Hope Mirlees
The Boats of the Glen Carrig by William Hope Hodgson
All Hallows’ Eve by Charles Williams
The Great Dark by Mark Twain
The Fabulous Baron Munchausen and The Fabulous World of Jules Verne, two films by Czech director, animator, and special effects genius Karel Zeman

Well, one of these entries isn’t a novel at all but two films – so that breaks the criterion straight away – the Lewis is surely not forgotten (I have an as yet unread copy on the tbr pile,) the Mirlees and the Hope Hodgson are regularly cited as fantasy classics. Make of that what you will.

Since Fantasy isn’t really my thing I’ve not actually read any of these titles though. Could any of these potentially change my reading habits?