In general, a port of entry (POE) is a place where one may lawfully enter a country. It typically has border security staff and facilities to check passports and visas and to inspect luggage to assure that contraband is not imported. International airports are usually ports of entry, as are road and rail crossings on a land border. Seaports can be used as ports of entry only if a dedicated customs presence is posted there. The choice of whether to become a port of entry is up to the civil authority controlling the port.
A port of entry at Shir Khan Bandar in northern Afghanistan near the Tajikistan border.
Border control comprises measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it also encompasses controls imposed on internal borders within a single state.
As seen from the Bhutanese side
As seen from the Indian side
The gate that borders East Nusa Tenggara in Indonesia and East Timor
A train crossing the China–Russia border, travelling from Zabaykalsk in Russia to Manzhouli in China