Isak Andic, the billionaire founder of high street fashion chain Mango, died in an accident on Saturday while exploring caves near Barcelona.
Spanish media reported the 71-year-old fell down a ravine to his death while hiking in caves that are part of a mountain range.
Andic was with his son and other family members when he fell, according to the El Pais newspaper, triggering a large emergency response.
The Turkish-born businessman founded Mango with the help of his brother, Nahman, in Barcelona in 1984 and the chain now operates almost 3,000 outlets in 120 countries. Forbes estimated Andic's net worth to be $4.5bn (£3.6bn).