before sunset, head over to marina barrage for a spectacular sunset and a chance to watch locals fly their kites on the green roof above the dam. the pool. recover recently completed an american hydrotech intensive, 15,000 sqft green roof above the maple street parking garage located at the washington center . perry. spotlights project different light objects onto the roof surface at night. urban wildlife visits green venture\u0027s ecohouse. photo credit: greig reekie photography.