Outdoor fireplaces don't have to be rustic - here's a great example of modern design.
Bold outdoor fireplace. More outdoor fireplace ideas: http://www.midwestliving.com/homes/outdoor-living/29-outdoor-fireplace-ideas/page/9/0
Chairs around a glass-topped coffee table beside an outdoor fireplace
12 Amazing Outdoor Fireplaces and Fire Pits: Design by Joan Grabel. From DIYnetwork.com
Like the concrete spheres would prefer a smoother face- maybe concrete for modern minimal look 53 Most amazing outdoor fireplace designs ever
An Awesome Modern Outdoor Fireplace
modern outdoor fireplace
vertical white fence. outdoor fireplace in the wall. clean and modern outdoor space.
Historic Layered With Mid-Century Modern
Minimalist extra-long fireplace for outdoor heating. It feels as good as it looks!