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Bande Amir Lakes, Afghanistan.

An aerial view of mountains in Afghanistan taken from a U.S. Air Force C-130 Hercules.

Hindu Kush Mountains from the air, which stretch as far as the eye can see.

An aerial view of mountains in Afghanistan.

Snow-capped Hindu Kush Mountains from the air.

An aerial view of mountains in Afghanistan taken from a U.S. Air Force C-130 Hercules.

Deep river valley in the Hindu Kush Mountains.

Band-e Amir Lakes, Afghanistan, part of Afghanistan's first national park.

Topography of Hindu Kush Mountains and surrounding areas.

Kabul River cutting through the Hindu Kush.

The Band-e Amir lakes, Afghanistan, are at 3,000m above sea level.

Hindu Kush Mountains outlined in snow.

Band-e Amir Lakes, Afghanistan, one of the five lakes within the region.

1919-1920 - Tangi Gorge in the Khyber Pass.

1890-1910 - The Khyber Pass in the North West Frontier Province of Pakistan.

1890-1910 - Fort Maude in the Khyber Pass - North West Frontier Province - Pakistan.

1842 - Descent through the Koojah Pass in Afghanistan.

1879-1880 - The Lahor Gate, standing at the confluence of many roads leading into Kabul.

A mountain pass winding through the deep valleys of the Hindu Kush.

Khowst-Gardez Pass, Afghanistan. US Marines conducting security and stabilization operations to secure mountain passes.

Looking down the Khyber Pass into Pakistan as it rises high into the mountains towards Afghanistan.

1878 - Afghan tribal chiefs and a British Political Officer at the Jamrud Fort at the mouth of the Khyber Pass.

The high-altitude, snow covered Salang Pass.

Entrance to Salang Pass - the only north-south route through the Hindu Kush open all year round.

Inside the Salang tunnel, which is famed for the dangers of avalanches and a devastating tunnel fire.

1919 - View from Michnee Khandao (the last blockhouse) looking towards Landi Kotal in the Khyber Pass, North West Frontier.

1879-1881- 63rd Regiment Barrack Square in Afghanistan's mountains.

Pashtun elder, Afghanistan.

1919-1920 - Portrait of a Pashtun, famous for their tribal independence.

1919-1920 - Portrait of a Pashtun girl carrying water.

A US jet refuels over the Hindu Kush Mountains.

1919-1920 - A Pashtun girl in tribal dress.

One of the minarets of the Musalla of Herat.

1907 - Afghan cavalry meeting a British Officer.

1879 - 1880, Bala Hissar - Lahor Gate.

Pashtun tribal nomads in the Mountains.

Pashtun musical instrument maker, Kabul, Afghanistan.

Soviet tank leaving Afghanistan as part of the publicised withdrawal announced by Gorbachev in Vladivostok.

Pashtun tribal nomads in the Mountains.