I can help with that, but I don’t currently have enough context to determine what you’re asking about with “var ligger jamaica.” If you’re asking for geographic location, here are the basics:

• Jamaica is an island nation in the Caribbean Sea, part of the Greater Antilles. It lies roughly 145 kilometers (about 90 miles) south of Cuba and about 190–215 kilometers (120–135 miles) west of Hispaniola, depending on the exact reference point. Kingston is the capital. The island covers about 10,990 square kilometers (4,240 square miles).

If you meant something else by “var ligger jamaica” (for example, a phrase in another language, a specific place on the island, or a cultural reference), please provide a bit more detail and I’ll tailor the explanation.