The metaphor is also referenced in the Chinese adage "we are all brothers of the Four Seas", a proverb with utopian undercurrents. The lyrics of a popular Han Dynasty folk song extol that "within the Four Seas, we are all brothers, and none be taken as strangers!"
Here is a good gathering place for all of world from every directions than fours.
The center piece of the park is a series of four small lakes separated by narrow waterways. One area of the lakes is given over to lotuses; another has people fishing; and a third has paddle boats. The cache is not inside of the park and its size is acceptable for small items.
There is a cache retired in the name of Fours seas:
http://www.geocaching.com/geocache/GC2NZPV_four-seas