We went to a couple of the smaller Ludwig II gaffs when we went to Bavaria - Lindenhof and the little mountain bolthole that I can't remember the name of. Amazing places but Neuschwanstein looks next level.
Ludwig was an interesting character, too - mates with Wagner at the point where Wagner had basically been cancelled for being a seditious radical, idolised Louis XIV and paticularly the idea of him as a centre-of-everything absolute monarch (hence the Versailles-inspired decor) but actually hated public events and was largely at the beck and call of his ministers. Eventually got fed up of arguing with politicians and flounced off to spaff the public finances on Neuschwanstein, got declared mad, then was finally probably bumped off.