There Are Stairs,

then there are stairs,

like these ones on the left, looking like a piano gives them a different look, but they are not finished yet, they also sound like a piano, the piano-style stairs are at the Wulin Plaza in Hangzhou, capital of East China's Zhejiang province, the stairs are able to make relevant sounds when people place their foot on the "key" of its steps, I am guessing any time now an enterprising group of musicians will compose a piece to play on the stairs which will see them tapping out a tune or two!