On the easter border of the scenic Orkhom Valley lies Kharkhorin, the center of the Genghis Khan Mongolian Empire. If you wish to visit this ancient city from the US, you can book a flight from the East Coast to Chinggis Khaan International Airport (UBN). It is one of the two major international airports serving Mongolia, and most flights from New York Airport (JFK) and Atlanta (ATL) have at least one layover en route to UBN.