Unusual layout and mapping ethics

Hi everybody, I've played around with hammer and I now consider I can think about a real map with a real layout. What pops to my mind for a theme idea are the places I've visited over the last 5 years, particularly museums. I'm remembering some that I would see myself great, gameplay wise (yeah that's bad for arts).

Would it then be acceptable to replicate some part of them? Indeed museums are sacred and I wouldn't want to encourage anyone to destroy them! If so does someone think it could viable to adapt it? I mean if some floors and areas are off limits so that can create a good layout. (It isn't specific I know, that's why I'm giving you this link to show you what I could see adapting ) http://www.foto360.ee/tmp/kumu2/index_eng.html

I hope someone could at least help me with the moral dilemma, thanks in advance!

Yes I've played it several times, actually it was one the first workshop map I've downloaded, however it isn't so much an "indoor" museum map, so it wouldn't be the same. What scares me then it is the scale of the map since his map was covering half the indoor museum part I thought to map..