Structures Wall The wall is in length and varies between , originally enclosing of land. On flat terrain the wall was generally built higher than that on either of the two hills over which it passes, as higher walls were seen as less necessary along hilltops. The parapets are made of stone and brick, like most of the fortress, and were in height. All parts are well-maintained and the whole circuit can be walked easily. The Four Main Gates The 1795 fortress had four gates: Janganmun (north gate), Hwaseomun (west), Paldalmun (south) and Changnyongmun (east). Janganmun and Paldalmun are the largest of the four main gates and resemble Seoul's Namdaemun in roof design and stone and woodwork. Indeed, Janganmun is the largest gate in Korea. Both the north and south gates are topped with two-storey wooden pavilions, while Hwaseomun's and Changyongmun's, those of the west and east gates respectively, have only one storey. The four main gates are encircled by miniature fortresses which were manned by guards. Meanwhile, Changyoungmun was greatly destroyed during the Korean War and it was restored in 1978. The Modern Days Entries Nowadays, the intra muros Suwon requires large entries for the modern roads needed by visitors and inhabitants. These large roads were built during the period when the wall was down, and the 1975 reconstruction had no choice but to preserve these roads. For three of them, the rampart walk has been rebuilt as a bridge between two neighboring structures: The North Entry by a bridge between the North Gate Janganmun and its Eastern Gate Guard Platform. The East Entry by a bridge between the North-East Crossbow Platform and the North-East Observation Tower The West Entry by a bridge between the West Gate and the North-West Pavilion. Additionally, two small underpass related to Mount Paldal were preserved. They are situated respectively near the West Turret 1 and the South Turret. Concerning the South Entry, i.e. the biggest one, a more radical solution has been used. Four no more extant structures (the South-West and South-East Gate Guard Platforms, the South Secret Gate and the South Observation Tower) were not rebuild at all and now the South Gate, Paldalmun, remains isolated from everything, like an island in a flood of traffic. Other structures Among all the structures along the wall (see descriptions below), the most striking are the floodgates the remaining two watchtowers, both three-storey and with