My favorite caves, although there's thousands to chose from would be.
Breakish Bridge Cave (upper) Isle of Skye
Cave of the Lyre system Applecross Scotland
Mousegill Cave
Long Churn Caves
Jackdaw Hole.
Sodholegill Caves
Goyden Pot System
West Kingsdale system
Mossdale Caverns
Fossil Pot
Routingill Pot
Otterstone Cave
Thundering River Cave in Wharfedale
Butter tubs
Providence Pot
Boltby Quarry Caves
P8
Giants Hole
Perryfoot Cave
Ladyside Pot
Dowel Resurgence
Cresswell Caves
Oldtor mine
Peak-Speedwell system
Holwell Cavern
Conisbourgh Caves
Out of my own list of favorite caves that's all I can think of now..
If it were possible to include hypothetical caves I'd definitely include the Great Whernside master caves, as we spend enough time thinking, talking and visualizing them.....