|Army vows to secure 'every inch' of Pak-Afghan border by 2018|
Pakistani soldiers at the forts spaced along the frontier scanned the rolling, bush-covered hills on the other side.
Inside the forts, more troops monitored CCTV cameras trained on the fence, illuminated by solar power at night.
The military also took reporters by helicopter to Kitton Orchard Fort near Ghulam Khan in North Waziristan, more than 200 kilometres away.
Pakistan and Afghanistan have long accused one another of offering safe havens in the border region, from where militants could launch devastating cross-frontier attacks.
In August, US President Donald Trump lambasted Islamabad for harbouring "agents of chaos" on its soil.
Washington has for years accused Pakistan of allowing Afghan Taliban fighters to regroup inside its borders and target NATO and Afghan troops inside Afghanistan.
Islamabad has repeatedly denied the accusations and claimed the US has ignored the price it has paid in thousands of lives as it grapples with militancy.
Kabul, meanwhile, has denounced the fence, which threatens to upset the daily lives of communities who have traditionally paid little mind to the border.
Afghanistan has refused to recognise the Durand Line — a 2,400-kilometre frontier drawn by the British in 1896 — as it splits the Pashtun ethnic group between the nations.
Some villages straddle the frontier, with mosques and houses with one door in Pakistan and another in Afghanistan.
Residents there now face stricter controls and are obliged to use official crossing points, which are subject to delays and frequent closures, including one that was lifted last week after a full month.
The media visit to the fence came after a US drone targeted a compound along the border used by Taliban-allied Haqqani fighters late Monday, killing over two dozen militants.
The barrage was initially reported to have struck inside Pakistan but this was later refuted by Islamabad, highlighting the opaque nature of where the border exactly lies.