“The Metropolitan Railway of Constantinople from Galata to Pera” – this was the name of the today’s Tünel when it was constructed 1871. The underground train that runs all day long and has only two stations can get you from the Karaköy bank up to the Tünel Square (Tünel Meydani) at the end of the Istiklal Avenue (Istiklal Caddesi). The Tünel is open every day till 11pm and costs 1 lira (50 eurocent). On weekends and holidays, the times are different. This magnificent construction designed by a French engineer and built under the rule of an Ottoman sultan was decorated with beautiful tiles not long ago. The Tünel is the second-oldest underground railway after the London Underground and so – is really worth visiting.