The Denver Botanic Gardens boasts one of the most beautiful — and intimate — open-air concert halls in the city, where it hosts its annual summer music series under the stars. Tickets can be pricey and hard to come by, but they're well worth the effort. And who better to choose the performers for such an exclusive venue than Swallow Hill, Denver's own acoustic-music stronghold, where music and beauty have always walked hand in hand? As Swallow Hill seeks to broaden its constituency by offering more diverse concert performers and the DBG continues to grow, the two organizations should make beautiful music together.