All over Iran you can find beautiful gardens. Nine of them are inscribed on the list and I visited six of them.
To fully appreciate it, you should visit the gardens not in wintertime, which unfortunately I did. Most of the fountains in the gardens won't have water in it and the trees are mostly without leaves and there will barely be any flowers.
I did enjoy them nonetheless.
I first visited Bagh-e Eram in Shiraz. There was no water in the canals but the turquoise pond in front of the beautiful Eram palace and the surrounding palm trees from the Canary Islands were lovely.
Another one is in Pasargadae (a UNESCO site inside a UNESCO site). Since Pasargadae is an archaeological site, there is little left over from the garden. The only thing left from the garden is the outline of the watering canals.
The Bagh-e Shahzadeh (picture) in Mahan has a really nice long split-level fountain (fortunately there was water flowing, although I heard that a few weeks before my visit it was completely dry).
Only half of the Bagh-e Dolat Abad in the desert city of Yazd is open to the public, but it's still nice to visit, mostly because of the pavilion with the stain glass windows and the largest wind tower of the city (when you stand underneath it you can really feel the wind).
The Bagh-e Chehel Sotun in Esfahan has the palace I liked the most. It has amazing frescoes on the inside and the outside.
The last one I visited was the Bagh-e Tarikhi-ye Fin in Kashan. It has a really nice small pavilion, a bath house and the small museum hosts some really nice pieces. It was also one of the few gardens that had water running through it in winter.
Even though winter is not the best time to visit the gardens, I still enjoyed visiting them. On Fridays lots of families will visit the gardens and on other days you are likely to bump into young couples who will offer you tea.