Aya Sofya - -one of the most beautiful buildings in the world

Renowned as one of the most beautiful buildings in the world, the spellbinding Byzantine glory of the Aya Sofya Museum (Hagia Sophia) is not only one of the top things to do in Istanbul, but also in Turkey. The staggering bulk of its exterior is rimmed by the delicate minarets added after the Ottoman conquest, while the sumptuous and cavernous frescoed interior is a grand reminder of old Constantinople's might and power. This famed monument is a must-do for every tourist visiting the country.