Galata Tower, Istanbul (must see)

One of the city's most distinctive sights, this great fortification dating back to 1348 was erected by the mercantile Genoese Italians as a vantage point over the city walls and was subsequently used as a fire lookout tower until as recently as the 1960s. At nine stories and 67 meters in height, it is one of the best places to put Istanbul's defining landmarks in a cityscape perspective: all major sights are within easy view and you can walk around the outside platform for a full 360-degree look – provided, of course, the weather is right.

The walk to the tower, which is situated on high ground, can be strenuous for some; don't be afraid of the tower climb, however, as you'll ride in a very modern elevator. While you're there, you can have a drink from the cafe upstairs and prolong your time just a bit more. The lively area around the tower is home to some interesting restaurants, bars and cafés, and you can also take a leisurely walk up Galip Dede Caddesi with its abundant musical instrument shops.

Tip:
Be sure to pick an off-peak time. The tower opens at 9am, so aim to make your way up around then or around sunset. In the evenings, the restaurant hosts a dinner/cabaret show including the always popular belly-dancing.