Though you can find decorative trench grates like this at Home Depot, most are boring, black drain covers. If you aren't careful with installation, they can make your patio look like a parking lot.

Trench Grate in Pattern (KEYHOLES-122) Tree Grate in Firework (FIREWORK S1000/545) Tree Grate in Wheel (FIRE WHEEL R1000/400) Tree Grate in Stargrate (STARGRATE R2000/980) Pool Grate in Chiseled ...