Lego House (Formerly in Surrey, England)
Cost: The building efforts of 1000 volunteers
In August 2009, British TV presenter James May constructed a house entirely out of Legos for his TV series Toy Stories. The house took 1000 volunteers and 3.3 million Lego bricks to assemble.
The Lego house--not the most attractive house, clearly--was 20 feet tall and featured a working toilet, shower, and sink, as well as a comfy Lego-brick bed. The initial plan was to sell it to the Legoland theme park in Berkshire; that idea fell through when Legoland determined that the house would be too hard to move and would cost too much to take apart and rebuild.
May suddenly found himself with a Lego house that nobody wanted--including the wine estate that it had been built on (those folks needed their land back for grapes). May's Lego house was demolished on September 22, 2009--just weeks after its completion. The 3.3 million Lego bricks used to construct the house were donated to charity.