Susa

1- one of best ancient Area in Iran
2- the museum is good .
3- best time to visit there is in winter .
4- Ancient castle is amazing when you understand its story about how it is built.

Shush Castle is located in the ruins of the ancient city of Shush. It was constructed by French archaeologist Jean-Marie Jacques de Morgan in the late 1890s, as a secure base for archaeological exploration and excavation. The Castle is similar to medieval monuments in France, but it has also been integrated from the Iranian architectural style. The structure was built by local craftsmen with bricks taken from two other archaeological sites, the Achaemenid Dariush castle and the Elamite Choqazanbil ziggurat, these bricks are between 3 to 7 thousand years old. It is built atop a hill which may contain other relics of past times.

Not much here as it has pretty much been depleted by De Morgan about 120 years ago. You can find most of its pieces in the Louvre. There is an impressive base of a column and half of a top of a column which is a bull's head here and that is all.

Pictuer from apadana and susa castle

There is not much to see at the archaeological site. Some pieces of columns. That's it. Not comparable with Persepolis which is quite impressive.
The museum has some nice artefacts in display, but all behind glass, making photography difficult. It's ridiculous that almost double the price of Persepolis is charged.

Susa is a cradle to mankind. Unfortunately the remains are very poor due to the clay structures. More or less the only place that is open to public is the remains of the achemanid palace. Who has already visited persepolis will recognise some similarities. But persepolis is much more impressive. The most impressive building is maybe the so called french castle.
But all in all a place worth visiting to get an idea of that culture

Great and wonderful place