The mausoleum of King Amanullah Khan marks the burial place of Afghanistan's independence-era ruler, who led the country after the Third Anglo-Afghan War and tried to push through ambitious reforms before his abdication in 1929. His body was returned from exile and buried in Jalalabad.
For travellers with a serious interest in Afghan history, the tomb gives Jalalabad a more specific story than its role as a road city between Kabul and the Khyber. Conditions around access and security can change quickly, so ask locally before seeking it out.