I like :
1. The Tower of Pisa
The 12 th –century tower , one of Italy’s most famous images , was closed in 1990 because it was deemed to be Leaning too far for tourist to climb safely .
2. Red Squre
A squre in Moscow , Russia , about ¼ mile (0.4 kilometer) long, lies just outside the walls of the Kremlin . The tomb of Lenin was placed in Red Squre .
3. The Coliseum
A famous building in Rome , Italy , built by the Roman emperors Vespasian and Titus for contests and games . The Building was completed by A.D.80. Parts of it are still standing .
4. Hagia Sophia (Aya Sofya)
Emperor Justinian (East Roman) commissioned Hagia Sophia Church. The construction was begun in 532 and its opening ceremony took place in 537. It was dedicated to Christ as Holy Wisdom. The architects of the building are Anthemios of Tralles and Isidoros of Miletos. Materials were brought from Ephesus, Athens, Rome, and Delphi and were used in the construction of this magnificent building. This church occupies a dominant place adjacent to the walls encircling the palace of the Ottoman sultans in Istanbul. Sultan Fatih Mehmet converted this building into a mosque shortly after he conquered the city of Constantinople (1453). It became the mosque of the Topkapi Palace (Istanbul) after the relocation of the palace from Bayazid to Sarayburnu. Hence, Hagia Sophia became a ceremonial sultan mosque, where each friday Muslims from the suburbs of the city gathered to pray in the company of the sultan. Its name was modified as Aya Sofya Camisi. As the most prominent building of a religion revealed by God, Hagia Sophia was celebrated widely among the Christians and Muslims alike. Thanks to this precept, this grandiose monument still stands in all its majesty. Now its used as Museum, there is no religious service.