The "edge of heaven and the corner of the sea" both refer to the remotest place.

天的边缘（天涯），海的角落（海角），都是指非常遥远的地方。

youdao

You mention the remotest, most evocative place-names in the world and someone is bound to say 'I've been there' meaning, 'I drove through it at 100 miles an hour on the way to somewhere else.

你提到世界上最遥远、最引人遇思的地名，准有人说“我去过那儿”——意思是：“我在去另外一个地方的路上，以100英里的时速路过那儿。”

youdao