This incredible collection of aerial photographs taken above New York gives a rare glimpse of a hidden rooftop world.
Just a few stories above the non-stop hubbub of city life exists an incredible oasis of lush gardens, restaurants, swimming pools and even tennis courts.
Thanks to Mayor Bloomberg's eco-friendly 'roofscaping' initiatives, the tops of dozens of buildings have been transformed into amazing outdoor living spaces and models for green-city living.
Secret world: One of photographer Alex Maclean's amazing aerial shots shows a block in Upper West Side
Growing trend: A one acre urban farm in the Long Island City neighborhood of Queens
Le Bain Roof Bar Meatpacking District
Urban jungle: A multi-level rooftop garden overlooking Central Park in Manhattan's Upper East Side
Artificial materials and pebbles make up the camouflage pattern on the roof at the Museum of Modern Art
Transformation: The High Line, an elevated park in the sky built on top of the tracks of a disused railway, weaves its way through the city blocks
Tudor City, Manhattan: A mid-rise apartment building topped with terrace gardens detailed with Tudor style flourishes
Chocks away: A vintage bi-plane is pictured on the roof of 77 Water Street in the city's financial district
Chelsea, Manhattan: A Cool mural on a white roof above a gallery building in Chelsea
Green living: A beautifully detailed high-rise terrace garden in Battery Park City
The School of the Future building at 127 East 22nd Street
Aerosol Art Center: An outdoor art exhibit space in Long Island City. A Mecca for graffiti artists the world over
Manhattan: New roof terraces in various stages of construction are configured around headhouses, lightwells and water towers
A stunning selection of roof gardens above 166 Bank St
Showpiece: The green roof above the Morgan mail processing facility, covers 109,000 square feet, or nearly 2.5 acres. During construction, approximately 90 percent of the original roof was recycled