[citation needed] One of nine remaining wild populations of Seven-Son Flower (Heptacodium miconioides) is located on mount Tiantai.

[3] In the mythology of Traditional Chinese religion, the creator goddess Nüwa cut the legs off a giant sea turtle (Chinese: 鳌; pinyin: áo) and used them to prop up the sky after Gong Gong damaged Mount Buzhou, which had previously supported the heavens.

[citation needed] Guoqing Temple on the mountain is the headquarters of Tiantai Buddhism,[5] and also a tourist destination.

Tiantai, named for the mountain, is an East Asian Buddhist school of Mahāyāna Buddhism that developed in 6th-century China and focuses on the Lotus Sutra.

The mountain has a famous temple to the Song-era Chinese Buddhist monk Ji Gong at the Cave of Auspicious Mists that was associated with early modern fuji or "spirit writing" movements.