Panam Nagar or Panam City is well known as the “Lost City” to Bangladeshis. Historical Panam Nagar is located in Sonargaon Thana of Narayanganj District, near Dhaka . In the 15th century, Isha Khan established the first capital of Bengal at Sonargaon. This city has been built in an area of about 20 square kilometers of Sonargaon. In 2006, Panam Nagar was included in the list of 100 endangered historical structures of the world created by the World Monument Fund.
Panam City is surrounded by Pankhiraj Canal on all four sides. The Pankhiraj canal joins the Meghna river called Menikhali river. Meghna river is on the east side of Panam city and Shitalaksya on the west side. Muslin was exported through this river. There is a huge gate at the entrance of Panam city, this gate is closed at sunset. Even now, no visitor can stay in Panama City after dusk.
There is a difference in the construction style of various buildings in Panama City. Every building in this city of the then wealthy class has exquisite craftsmanship and a touch of nobility. There are about 52 buildings on both sides of the road that cuts through the heart of the city. There are 31 buildings on the north side of the main road and 21 on the south side. Some of these buildings have one floor, some have two or three floors.
Apart from residential buildings inside the city, there are mosques, churches, temples, monasteries, dance halls, chitrashalas, panthshalas, khajanchikhanas, court rooms, old museums, baths and secret passages. Besides, 400 years old mint house and indigo made by East India Company can be seen here.