French Open organizers have ambitious plans to build a new roof on center court, similar to that at Wimbledon, but also to extend the present cramped grounds.

CNN: Roland Garros suffers uncertain future

Members of Cambridge University Officers' Training Corps (CUOTC) have agreed to build a platform representing the roof of the 70ft (21m)-high Senate House, and a vehicle will be hoisted to the top.

BBC: Cambridge University Austin Seven roof stunt recreated

The Matsigenka hunt for monkeys and parrots, grow yucca and bananas, and build houses that they roof with the leaves of a particular kind of palm tree, known as a kapashi.

NEWYORKER: Spoiled Rotten

Greenwich Hospital Estates, which has owned the market since 1849, plans to build a 104-room hotel, provide office space and replace the market's canopy with a glass roof, but keep the original structure.

BBC: Demo against Greenwich Market redevelopment

But one rock climbing devotee in Turkey wanted something closer to his home, so he had American company Rockwerx, based in Baltimore and Massachusetts, build for him a private rock wall that required removing the roof and raising its height.

FORBES: Rock Climber's Home, Ankara, Turkey

The property got a lot of press a few years ago when plans to build several swimming pools on its roof were announced.

FORBES: Jeff Greene Is Now Proud Owner of 55-Acre Hamptons Estate

But while green roofs might cost twice as much to build, they have been shown in Europe to last twice as long as a conventional roof.

FORBES: Magazine Article

Red Roof Inn and Motel 6 are economy brands that are hard to get a return on if you build a new one using their prototype.

FORBES: What Does It Take To Start A Hotel?