Santralistanbul MuseumIn surroundings more green than Tophane and more peaceful than Beyoğlu, the gallery at Santral is a good bet for a cultural pit-stop on a boat trip up the Golden Horn. The curators put together exhibitions on eclectic international subjects, from German architecture to Italian design and Colombian contemporary art, with the focus switching occasionally to subjects taught at Bilgi University, which occupies most of this enormous converted Ottoman power station. In daylight, the steel and glass cuboid blocks that make up the gallery space are dark and imposing from the outside, but at night, illuminated, they come to life.