You can visit Iran attractions for free
I don't think anyone in the world likes spending money when they can do it for free. One of your costs on the trip is the entrance fee for tourist attractions. for example, in Iran, you will charge 5 to 20 dollars to visit a region or a museum. it's not an expensive cost, but when you can visit up to 20 places in a historic city and you have up to 6 historic cities with this feature on your trip, it's going to be very important.
How you can cut these costs. it's a simple way and you just have to organize your trip on an exact date. May 19 is the International Day of Museums and Cultural Heritage, all museums and tourist attractions are free. As you may know, this is the best time to visit Iran.
The pleasant weather and some seasonal festivals such as the watering of roses (Golab Giri) in Kashan make May the best time to visit Iran. The best suggestion is to visit Isfahan, Shiraz or Tehran on this date. They have numerous museums and historical sites that all would be free.
For example, if you are in Tehran on this date, you have enough time to visit the National Jewelry Museum, the National Museum, and the Carpet Museum.
Alongside these free museums or historical sites, you can also visit some of Tehran's monuments that are always free and would have a completely free program of Tehran.

Tehran Grand Bazaar
Tehran is the greatest of the Iranian markets. Squat and once black in the heart of the city, like a covered railway station, stands the bazaars in the southern part of Tehran - oriental bazaars still not quite emasculated yet, for all the rubber sandals from Hong Kong and plastic bags stamped with the initials of totally imaginary airlines. These bazaars deserve a hall-day stroll.

Tajrish Bazaar
It is an old and traditional bazaar much smaller than the grand bazaar, but much cleaner and located in the northern part of Tehran. You can plan your visit in order to stop at the bazaar before and after visiting the Sadabad Royal palace complex or Darband recreational area. it's only a 10-15 minute walk.
The Tajrish Market is a must-visit to feel the local market and local culture of Tehran. Go and buy nuts, fruits, the best quality of saffron in the region. A walk in the evening in this lively and lovely area is also nice and exciting.

National Garden Gate
The National Garden is a historical and governmental compound in Tehran, Iran.
Formerly referred to as the Parade Square, it used to be a military shooting range during the Qajar period. It was then turned into a public park for a short period, and eventually, important governmental offices and museums were built around it.
Building number 9 of the Ministry of Foreign Affairs (formerly the "Police House"), the University of Art (formerly the "Cossack House"), Malek National Museum, Post and Communication Museum, and the National Museum are situated in the compound.

Azadi Tower
The only remaining symbol of the Pahlavi era in Tehran.
This square and tower are one of the most famous buildings in Tehran, which is still a favorite of tourists and locals.
This Standing guard like a sentry at the gates of Tehran, Iran, is the impressive Azadi Tower (Freedom Tower), built-in 1971 and made up of eight thousand blocks of white marble. A combination of Islamic and Sassanian architectural styles, the fifty-foot tall tower commemorates the formation of the Persian Empire and is an interesting combination of modern and ancient cultures.
The tower is part of the Azadi cultural complex, located in Tehran's 50,000-square-meter Azadi square, which is made up of a museum and several fountains.

Shah Abdol Azim Shrine
One of the most important religious monuments in Tehran and Iran.
This monument belongs to the brother of Imam Reza the 8th Imam of the Shiites.
This historic tomb is visited by millions of tourists from all over the world every year.
You can visit the historical sections of this religious complex free of charge. Also, its historic market will be one of your most fascinating choices.