Three years ago, Walker released "Alone" featuring Swedish recording artist Noonie Bao, which garnered 941 million views and 7.3 million YouTube likes. The highly anticipated "Alone, Pt. II" MV is expected to replicate this success.

Walker, now 22 years old, first rose to fame after the release of his 2015 single 'Faded,' which received diamond certifications in Germany and Poland and multi-platinum certifications in over ten countries including the U.S. and the UK. 

Son Doong Cave is located in the heart of the Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site in Quang Binh.

According to National Geographic, the cave claims the title of the largest cave passage cross-section in the world./.