A chartered accountant-turned-photographer Aashish Vyas seems to have much to show about when it comes to staircases in the city. Currently underway is his first solo show, titled Treppe (which means steps in German), at the Jehangir Art Gallery, Vyas has been taking pictures of steps across the city — from the CST building to the forts in Bandra and Sewri, industrial spaces and private residences.