The phrase "chief attraction" refers to the main or most important thing that attracts attention or interest in a particular situation or place. Full definition
He remained, however, as the head instructor and chief attraction at the school. (questia.com)
Located off Thailand's west coast in the gorgeous Andaman sea, Ko Lanta's chief attraction for kids is its safe swimming. (travelfish.org)
The largest employer in the U.S. Chief attractions of a government job include diversity of career options, employment stability, salary, and benefits — including retirement plans. (careerdigital.com)