This red brick structure is the only remaining city gate in Haarlem. It was constructed in the early 15th century as part of the city’s fortifications. At the time, medieval Haarlem was protected from outsiders by a 7.5m-tall rampart, several watchtowers and 12 fortified city gates. Not surprisingly, the Amsterdamse Poort faces Amsterdam and it used to be the starting point for a journey to the Dutch capital. Once you’re back in Amsterdam, you can look for the Haarlemmerpoort, which marks the other end of the road between both cities. You can admire Amsterdamse Poort from the outside, but it isn't open to the public.