Porto
Hugging the coast with staggered, multicoloured terraces and stately bridges, you'll find this Portuguese city has only gotten better with age, like a good port wine. From Ribeira's sloping streets to the stark grandeur of Clerigos Tower, Porto overflows with sights, sounds and culture. With swimming pools built into rock, drop-dead gorgeous bookstores, and gut-busting Francesinha sandwiches, Porto's manifold experiences can overwhelm, so retreat onto the Douro river for some Porto-style R&R.