Around 1.5 hrs from Van to border. This check-point made me really impressive. There are no obvious sigh to tell ppl where should we go, so we just kept going...almost walked into the territory of Iran! No one stop us!! we returned to find the place to get a stamp, it came easily. Out of check-point on the side of iran, Iranian friend started to negotiate with one driver, looks like bargain is necessary here! But most of them cannot speak English only Turkish( Azerbaijan region) or Persian, it would be pain to me... Finally, the bargain was done, three passengers( Iranian, Turkish and Taiwanese) and driver drove to the edge of border, soldiers checked everyone's passport, they stare for a while and said " All of you has no stamp from Iran custom." Suddenly, three of us were in shock! What the hell...we just passed the check-point without any stop, even didn't know where it is. So we went back again to find the place to get entry stamp. Maybe because too many ppl wanna go to Turkey to day, so custom stuff didn't notice us just pass it...a iron shelter on the side of way. it's a little weird, there is a kiosk and gate in the end of path, but they don't use it.
Finally, we have the entry stamp for iran! Persia - one of well-known and huge empire in the history. My trip start from now on!