Ardavan Taherzadeh, a Canadian student at the University of British Columbia, was last heard from on May 21, 1997, during a phone call from the village of Koshla in Kullu district while backpacking in Northern India. He had spent a year teaching in Korea and was traveling the Parvati Valley region when he told family he planned to continue exploring; he did not board his scheduled flight home on June 25, 1997. His family reported him missing to the West Vancouver Police Department on June 28, 1997.

His mother, Homa Boustani, later traveled to India seeking answers and reportedly located a mortuary report from a Kullu district hospital describing the cremation of a foreigner without embassy notification. Investigators and a private company have suggested possibilities ranging from foul play near Manikaran to voluntary disappearance; a former Kullu district police superintendent noted obstacles in resolving older cases, including uncooperative residents and earlier investigative shortcomings. The case remains unresolved and open.

If anyone traveled in the Parvati Valley or Kullu district in May–June 1997 and remembers seeing Ardavan or anything unusual, please share what you know.