San Juan [1] is the largest port in the Caribbean, and it is a port of call or point of origin for nearly two dozen cruise-ship lines. The cruise ship docks lie along Calle La Marina in Old San Juan [2].
A few of the most popular cruise-ship lines serving San Juan include:
Links:
[1] http://www.moon.com/destinations/puerto-rico/san-juan
[2] http://www.moon.com/destinations/puerto-rico/san-juan/sights/old-san-juan
[3] http://www.carnival.com
[4] http://www.celebritycruises.com
[5] http://www.hollandamerica.com
[6] http://www.ncl.com
[7] http://www.princess.com
[8] http://www.rssc.com