The property includes nine gardens in as many provinces. They exemplify the diversity of Persian garden designs that evolved and adapted to different climate conditions while retaining principles that have their roots in the times of Cyrus the Great, 6th century BC. Always divided into four sectors, with water playing an important role for both irrigation and ornamentation, the Persian garden was conceived to symbolize Eden and the four Zoroastrian elements of sky, earth, water and plants. These gardens, dating back to different periods since the 6th century BC, also feature buildings, pavilions and walls, as well as sophisticated irrigation systems. They have influenced the art of garden design as far as India and Spain.
The Persian Garden consists of a collection of nine gardens, selected from various regions of Iran, which tangibly represent the diverse forms that this type of designed garden has assumed over the centuries and in different climatic conditions. They reflect the flexibility of the Chahar Bagh, or originating principle, of the Persian Garden, which has persisted unchanged over more than two millennia since its first mature expression was found in the garden of Cyrus the Great's Palatial complex, in Pasargadae. Natural elements combine with manmade components in the Persian Garden to create a unique artistic achievement that reflects the ideals of art, philosophical, symbolic and religious concepts. The Persian Garden materialises the concept of Eden or Paradise on Earth.
The perfect design of the Persian Garden, along with its ability to respond to extreme climatic conditions, is the original result of an inspired and intelligent application of different fields of knowledge, i.e. technology, water management and engineering, architecture, botany and agriculture. The notion of the Persian Garden permeates Iranian life and its artistic expressions: references to the garden may be found in literature, poetry, music, calligraphy and carpet design. These, in turn, have inspired also the arrangement of the gardens. The attributes that carry Outstanding Universal Value are the layout of the garden expressed by the specific adaptation of the Chahar Bagh within each component and articulated in the kharts or plant/flower beds; the water supply, management and circulation systems from the source to the garden, including all technological and decorative elements that permit the use of water for functional and aesthetic exigencies; the arrangement of trees and plants within the garden that contribute to its characterisation and specific micro-climate; the architectural components, including the buildings but not limited to these, that integrate the use of the terrain and vegetation to create unique manmade environments; the association with other forms of art that, in a mutual interchange, have been influenced by the Persian Garden and have, in turn, contributed to certain visual features and sound effects in the gardens.