Switzerland's Mont Blanc 1966 crash
In January 1966, Air India flight 101, the Boeing 707 (Kanchenjunga) crashed into Switzerland's Mont Blanc, killing all 117 passengers and crew members on-board.
After every few years, some remains of the aircraft were found at the crash site and some a little away from it.
Highly revered nuclear physicist Homi Jehangir Bhabha, the father of India's nuclear programme, was one of the passengers in that plane.