idiom · The most distant parts of the world; the ends of the earth.

即便你远在天涯海角，我也不会忘记你。

idiom · To be separated by a vast distance; extremely far away from each other.

虽然他们近在咫尺，心却像隔着天涯海角。

idiom · Tianya Haijiao, tourism area on the south coast of Hainan, 24 km west of Sanya; (idiom) the ends of the earth.

去三亚旅游时，我们在天涯海角景区拍了照。