A roof is the perfect place to build a house — you've got a view, and often you're hidden from the street. Here are pictures of some of the craziest and most astonishing rooftop homes around the world.

Twenty-five villas on top of a shopping center in Hengyang, China, August 2013.

Strange and Gorgeous Houses Built on Rooftops

Photo by Color China Photo/AP.

A little red Victorian house on top of the Penfield Manufacturing Company's factory in Syracuse, New York

(via Amy Dreher/luluinnyc)

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Didden Village in Rotterdam, Netherlands, by MVRDV, 2002-2006

(via ArchDaily)

The prefabricated LoftCube, designed by Werner Aisslinger in 2003, available for $60,000

(via LoftCube and Aisslinger)

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Three little houses, eight stories above Broadway atop a hundred-year-old apartment building, 2008

(via New York Times)

A clapboard house with brick chimney on top of a 4-story apartment building, New York City, 2009

(via ScoutingNY)

A Penthouse on an Art Deco building in Bondi, Australia, by MHNDUNION, 2010

(via MHNDUNION)

A rooftop in New York City by Acheson Doyle Partners Architects

(via jwilly)

Four villas on a five-story shopping mall in Zhuzhou, China, 2012

Every single square foot is marketable in China's second largest city, even it is atop a shopping mall.

(via China Daily)

A faux-mountaintop villa on the top of a 26-story building in Beijing, China, 2013

A Chinese doctor named Zhang Biqing has just spent the last six years constructing this $2.4 million (illegally built) villa, but the 10,000 square foot complex is now slated for demolition.

(via South China Morning Post)

The Trailer Park of Grand Daddy Hotel with Airstream trailers on the roof in Cape Town, South Africa

(via Grand Daddy)

Illegal rooftop structures in Hong Kong

These sheet-metal shacks (range between 100 and 300 square feet) were extremely cheap, the rent was only HK$1000-2000 instead of HK$28,000 for a 218 square feet one.

(Photos by Rufina Wu & Stefan Canham: "Portraits from Above", via TheFunAmbulist and Lumenvisium)

A pink house on Eight Avenue in Chelsa, New York City

(via Ephemeral New York)

Fallen Star, a miniature house of Do Ho Suh on top of a seven-story building of University of California in San Diego, 2011

(via Apartment Therapy)

Bonus: House Attack, by Erwin Wurm at the Museum Moderner Kunst (MuMoK) in Vienna, Austria, 2006

(via Dominik)