In a 19th-century building on a cobblestone street in Lisbon's Chiado district, Martinhal has built a city hotel designed from the ground up for families. Apartments range from studios with bunk beds in the living room to two-bedroom suites with separate spaces for adults and children. A supervised kids' club runs from 6 months through early teens, and a dedicated baby concierge handles the logistics of travelling with infants. Tintin artwork in the children's bedrooms gives a sense of where the attention has gone.