 Complete the following phrase:  Kabul is known for its historical gardens, bazaars, and palaces, well known examples being the Gardens of Babur and Darul Aman Palace. In the latter half of the 20th century, it became a stop on the hippie trail attracting tourists, while the city also gained the nickname Paris of Central Asia. This period of tranquility ended as Kabul was occupied by the Soviets in 1979, while a civil war in the 1990s between various rebel groups destroyed much of the city. 