The calm backdrop of Wicklow Mountain National Park.

6. Ireland

For: A scenic, reflective journey

What to Expect: For one thing, a variety of breathtaking backdrops you can easily hop between on trains across the Emerald Isle. Start in Dublin, where you’ll meet a high concentration of international travellers at a pub (especially Temple Bar) at any given time. Then make your way to gorgeous nearby destinations, Wicklow Mountains National Park, for a P.S. I Love You-inspired day trip. Or head to Doolin for the best live Irish music and a photo-op at at the majestic Cliffs of Moher. Pro tip: Strike up a convo with your bartenders, they’re usually pretty friendly.