The Great Wall's main gate as it snaked down the mountains and to the sea, the First Pass served as Shānhǎiguān's east gate and principal watchtower. Two storeys tall, with double eaves and 68 arrow-slit windows, it's a towering 13.7m high, with an enceinte extending east.

You can walk the town walls south to the Jìngbiān Watchtower (靖边楼; Jìngbiān Lóu), which also serves as an entrance for the First Pass.