This outdoor fireplace is a strikingly modern addition to the patio. Each outdoor fireplace is constructed from a single piece of weathering steel, a heat-resistant steel alloy that develops a stable, rust-like finish when exposed to the elements. This outdoor fireplace is a strikingly modern addition to the patio. Each outdoor fireplace is constructed from a single piece of weathering steel, a heat-resistant steel alloy that develops a stable, rust-like finish when exposed to the elements. Terrain is a garden and home brand deeply rooted in nature and plant life. From weather-ready planters and outdoor furniture to artisan-made wreaths and hand-poured candles, their curated product assortment explores the boundaries of life lived outside and in. With a globally conscious, locally influenced point of view, Terrain offers inspired seasonal solutions for creative living, gathering, and gardening.