Greenisland is a small village on the outskirts of Belfast and Carrickfergus.

From the Doomsday project:
Greenisland's existence as a centre of population is due mainly to the advent of the railway in 1847.
The original station, Carrickfergus Junction ,was built as a turning point for main line trains on the Belfast - Ballymena line. In 1848,the track was extended to Carrickfergus with a halt at Trooperslane,and 5 trains each way.
The continuation to Larne in 1862 introduced the 'Villa Ticket' anyone building a house within one mile of a station was entitled to free first or second class travel(depending on the valuation) for 10 years. Carrickfergus Junction became GREENISLAND in 1893.
The construction of the Loop Line (1931-34)avoided the necessity for mainline trains to reverse at the turn table at Greenisland.