Saint Sophia's Cathedral is one of the most iconic landmarks in Kyiv, Ukraine. This UNESCO World Heritage site dates back to the 11th century and is renowned for its stunning Byzantine architecture and golden domes. Visitors can explore the cathedral's interior, which is adorned with beautiful frescoes and mosaics, and climb to the top of the bell tower for panoramic views of the city. Saint Sophia's Cathedral is a must-see attraction for anyone visiting Kyiv.