The "Enterprise" train between Belfast and Dublin is considered one of the most scenic rail journeys on the island of Ireland. The roughly 2-hour trip offers a diverse showcase of the Irish landscape, ranging from the rugged coastline to lush inland valleys. Key highlights include crossing the Craigmore Viaduct near Newry—the highest viaduct in Ireland—which provides panoramic views of the rolling hills of County Armagh. The route also skirts the coastline near Malahide and Skerries, offering stunning vistas of the Irish Sea. In 2026, the service remains a peer-to-peer favorite for its relaxed atmosphere and "Enterprise Plus" dining options. While it may not be as dramatic as the Swiss Alps, its mix of historic stone bridges, sea views, and tranquil green pastures makes it a visually rewarding way to travel between the two capitals without the stress of the M1 motorway.