Khakestar (Persian: خاکستر, romanized: Khākestar), also called Rībāt-i-Khākistar, is a historical settlement and caravanserai in Khorasan in the mountains that now separate Iran from Turkmenistan.

[2] [3] Formerly a customs post on the border between Qajar Iran and Imperial Russia,[2] it is located on the banks of the Lain stream, which flows down from here to Kaakhka in Turkmenistan.

[6] In the late 1800s, Mirza Reza Khan Arfa od-Dowleh visited the village of Khakestar after hearing a story about its inhabitants' longevity.

[5] In years where the harvest was good, their diet consisted of wheat bread and dairy products - milk, cheese, and yogurt.

[5] In 1918, the British agent Reginald Teague-Jones stopped at Khakestar on his way from Mashhad into Russian territory; at that time, Khakestar was a quarantine post for travellers coming into Iran from Russia, where there was an outbreak of cholera at the time.