Port Antonio’s heart is the Town Sq, at the corner of West St and Harbour St. It’s centered on a clock tower and backed by a handsome red-brick Georgian courthouse from 1895; the building is surrounded by a veranda supported by Scottish iron columns and topped by a handsome cupola, and is now a branch of National Commercial Bank. About 50m down West St is the junction of William St, where the smaller Port Antonio Sq has a cenotaph honoring Jamaicans who gave their lives in the two world wars.
On the west side is Musgrave Market , decked out in yellows and blues, a quintessential chaotic developing-world market supported by thick limestone columns. Following William St south to Harbour St, you can turn left to peek inside Christ Church , a red-brick Anglican building constructed in neo-Romanesque style around 1840 (much of the structure dates from 1903). Look for the brass lectern donated by banana-magnate Captain Lorenzo Dow Baker.
On the north side of the Town Sq is the marvellously baroque facade of the Royal Mall , a three-story complex painted a striking red, now more or less a covered shopping parade decorated and designed in a plethora of styles, including Tudor and Renaissance.