A date and an asterisk
The 1608 licence
In 1608, King James granted a licence to Sir Thomas Phillips to distil 'aquavite, usquabagh and aqua composita' for seven years within County Antrim. Bushmills puts that year on every bottle. The Old Bushmills Distillery Company itself wasn't founded until 1784. Kilbeggan in Westmeath has its own claim to oldest-working-distillery on different paperwork. The pub argument is older than the answer.
Narrow gauge, narrow road
The Causeway tram
The original Giant's Causeway Tramway opened in 1883 — hailed at the time as the first long electric tramway in the world — and ran from Portrush to the Causeway until 1949. The current Giant's Causeway and Bushmills Railway is a heritage revival, three-foot gauge, two miles long, opened to passengers at Easter 2002. Twenty minutes each way. Sit on the seaward side.
Spanish gold on the rocks
La Girona
On the night of 26 October 1588 a galleass of the Spanish Armada called La Girona, packed with survivors from other Armada wrecks, was driven onto Lacada Point a few miles east of here. Of around 1,300 people on board, nine survived. Sorley Boy MacDonnell of Dunluce Castle sent the survivors on to Scotland. Belgian divers found the wreck in 1967. Most of the gold and jewellery is in the Ulster Museum in Belfast.
A castle, a lost town
Dunluce
Dunluce Castle perches on a basalt stack five minutes' drive west of Bushmills. The MacDonnells built most of what survives in the 16th and 17th centuries; in 2011 archaeologists found the 'lost town of Dunluce' beside it — a planned settlement from 1608, with indoor toilets and a grid street plan, more or less revolutionary for the date. Abandoned after the Battle of the Boyne. The kitchen reportedly fell into the sea one night with the cooks in it. The cooks may be apocryphal. The cliff edge isn't.