The document discusses the Burgess Shale site in Yoho National Park, which gained attention after being designated a UNESCO World Heritage site, leading to increased visitor traffic and concerns about theft and damage to fossils. Parks Canada officials are considering fencing the site to protect it from theft, as noted incidents have result in legal consequences for offenders. The Burgess Shale is renowned for its well-preserved fossils, including over 120 species of ancient marine life, and efforts are being made to balance public access with conservation needs.