Quinta da Pacheca

Sleeping inside a giant wine barrel is the kind of idea that sounds like a joke until you see the porthole door opening onto Douro Valley vineyards. This wine estate stay sits on centuries-old grounds in one of Portugal's great wine regions, with a spa running Elemis treatments and a glass-fronted tasting room for food and wine pairings. The barrels are the obvious draw, but the view from any of them tends to settle the argument about whether to book.