firstly id want it as authentic as possible,so it would have to have be a proper stone dark cold room with mould mildew and water trickling down the walls, iron candle holders on the walls with wax dripping down no electric lights thankyou!
huge heavy creaking wooden doors, a huge rough stone table.
with plenty of chains, manacles, hooks etc on the walls and ceilings a metal pulley.
a torture chair,only this one would be slightly different as it would have a hole cut in the centre of the seat for positioning objects under if i was becoming too comfortable

there'd be too many toys to count! all the possible whips floggers paddles you could hope for,knives daggers swords razors, the nice clean shiny ones for play would be hidden only the rusty ancient evil looking ones would be on show of course, huge candles rope rope and more rope.

thats just the basics i could really go into detail but it would take forever lol