11. Explore Lough Neagh Lake by boat
To the surprise of many, Northern Ireland boasts the largest lake in the British Isles — Lough Neagh.
Located just to the west of Belfast, it actually borders five of the country’s six counties.
Its tranquil waterways and secluded bays provide ample opportunity for boating, fishing, walking and cycling. A great way to get a handle on the lake is to tackle the 113-mile-long Loughshore Trail – but don’t worry, it’s almost completely flat.
12. Explore Marble Arch Caves
The Marble Arch Caves is one of seven parks in the UK run under the umbrella of UNESCO.
Following a pleasant little walk down through the reserve, the tour begins with an atmospheric five-minute boat journey along the subterranean Cladagh River. It then continues through a succession of atmospherically lit chambers and passages.
Throughout there are clusters of weirdly shaped stalactites and stalagmites, as well as other impressive formations, such as flowstones and scallops (sculpted indentations caused by water flow).
Following a heavy Irish downpour, the caves are prone to flooding, so do check before you visit, and it's best to head here in the summer months. On that subject, read up on the best time to visit Ireland.