When it comes to architectural wonders that double down as places to stay, there's nothing quite like Casa Na Terra, an Alentejo escape from the minimalist mavericks at Silent Living. You have the whole house to yourself, most of which is below ground, with concrete floors and natural linens – everything you need, nothing extra. Breakfast is served up by a friendly housekeeper (fruit, eggs and cheeses) but you have a kitchen for lunches and dinners. Take things at your own pace, there are no alarms here except the sun. Golden hour sundowners with a cicada chorus? Count us in.