So. You’re an Egyptian Fatimid in the 11th Century and you need to get a load of spices, gold, slaves, and exotic animals over to a customer in Delhi. How? According to the Incredibly Detailed Map of Medieval Trade Routes created by Redditor martinjanmansson, it looks something like this: Cairo > Qolzum > Quesir > Aydhab > Aden > Salalah > Baruch > Ujjain > Gwalior > Siyadoni > Mathura > Koli > Delhi.
Don’t tell CK, but I think I spent two hours playing with this thing today.