Along Oba Sk Street, you'll also find a collection of cool cafes. Petra Roasting CoOne of the most well-known coffee roasters in Istanbul, Petra Roasting Co now has several locations dotted around the city. Each location has its own aesthetic; the Petra Cafe in Topağacı is known for its time-worn tiled floors and plush leather booths, while the trendy Bebek neighbourhood boasts a Petra Cafe with a coveted outdoor space. Petra Cafe Şişhane is all about refined minimalism, with steel reigning supreme – picture glimmering silver cups, countertops and serving plates. Seating is offered on rows of sleek white steps, though you can grab a coffee to go and take it to Şişhane Park.