World's Largest Cave: Hang Son Doong: Vietnam

World's Largest Clock Faces: Abraj Al Bait Towers: Mecca, Saudi Arabia

World's Largest Refugee Camp: Kutupalong Refugee Camp

World's Largest Buddhist Temple: Borobudur Temple

World's Most Expensive Stadium: SoFi Stadium

Inside the World's Largest Human Gathering: Prayag Maha Kumbh Mela