Here are some design ideas for outdoor fireplaces. Some of them are really breathtaking, take a look.

Horizontal Corten Steel Branch Wall
Made out of steel branches (30ft long by 9ft high ). The pool beneath is filled with pebbles. A burner for gas is hidden between the branches for ignition.

Firestack

Of wrapped steel or cast bronze .

Square Dish

A prototype for an outdoor fireplace with an original shape and a revealing name.

For more fantastic designs such as these, you can visit the site below.

firefeatures.com