Corner suite at the SPG LC Hotel Imperial in Vienna. It was also my last hotel stay with former ms. sosmart. She'll never see a room like that again.
It was just perfect. Not spectacular size-wise, but I felt like I was staying in one of the smaller rooms of the Vatican Museum, or some other such place.
Being European, I appreciate and understand the "from-another-era" appointments. My american partner's jaw just stayed dropped the whole day/night. Also, I think they let us check out at 6pm. On a points stay!
Banyan wing suites (only two of them) at the Surfrider are nice too. Good luck even paying for one.