This week marks the 15th anniversary of the death of John Denver. The famous country singer and 1975 CMAs Entertainer of the Year Award winner was flying an experimental two-seat plane near the Monterrey Bay in California when he plunged into the water from approximately 500 feet on Oct. 12, 1997. He was the only occupant at the time. Denver was just 53, and left behind three children. 

The 'Rocky Mountain High' hitmaker was an experienced pilot, but his plane ran out of fuel in one tank and he was unable to safely switch to the other tank before plummeting to his death. While he was plagued by alcohol-related legal issues in the years leading up to his death, a toxicology report revealed no drugs or alcohol in his system.

At the time, he had earned 14 gold and eight platinum album in the United States, but was popular worldwide. In his later years, he became as well-known for his environmentalism as his music, but hits like 'Take Me Home, Country Roads' and 'Thank God I'm a Country Boy' are still played today.