Benito Hernandez stands outside his home near San Jose de Las Piedras in Mexico's northern state of Coahuila on January 16. For over 30 years, Hernandez, his wife Santa Martha de la Cruz Villarreal and their family have lived in a sun-dried brick home with a huge 130-foot-diameter rock used as a roof. The dwelling is found close to the town of San Jose de Piedras, a remote community located in the arid desert of Coahuila, about 50 miles from the border with Texas.

Lucero Hernandez, granddaughter of Benito Hernandez and his wife Santa Martha de la Cruz Villarreal, stands in the doorway of her family's home near San Jose de Las Piedras in Mexico's northern state of Coahuila.

Santa Martha de la Cruz Villarreal stands nearby as her husband Benito Hernandez pours hot water into a cup at their home.

Benito Hernandez stands inside his family's bedroom at his home.

The home of the Hernandez family at night.

Maria Ponce, 78, waves to passersby as she stands in the doorway of her home that is constructed from recycled plastic bottles, near El Transito, El Salvador, Thursday Dec. 29, 2011. Ponce, who did not have money to build a traditional house, says in 2005 a dream revealed to her to fashion a home from plastic bottles, which took 3 months. Ponce and her 102-year-old companion survive on about 10 dollars a week which they make from their corn crop and donations from tourists making the journey to see "La Casita Encantada," or "The Enchanted Cottage."

Prudencio Amaya, 102, and his companion Maria Ponce, 78, stand in front of their home's facade, constructed from recycled plastic bottles, near El Transito, El Salvador, Thursday Dec. 29, 2011.

President Barack Obama approaches the podium before speaking on the debt limit impasse from the briefing room of the White House on July 31, in Washington, D.C. Obama indicated that he and Republican members of Congress have reached a compromise to solve the debt limit impasse prior to the August 2 deadline.

The so-called "Crazy House" (Verrueckte Haus), a single-family house upside down can be seen in the northern German town of Bispingen on March 27, 2011.

People check out the so-called "Crazy House" (Verrueckte Haus), a single-family house upside down can be seen in the northern German town of Bispingen on March 27, 2011.

People check out the so-called "Crazy House" (Verrueckte Haus), a single-family house upside down can be seen in the northern German town of Bispingen on March 27, 2011.

Newly elected freshman members of the upcoming 112th Congress pose for a class photo on the steps of the U.S. Capitol on November 19, 2010 in Washington, DC. . This week the new members have been undergoing orientation before taking office in January.

Staff members photograph the freshmen class of House members of the upcoming 112th Congress during a group photo on the steps that lead to the House of Representatives, on Capitol Hill in Washington, Friday, Nov. 19, 2010.

Rep.-elect Cory Gardner, at left and Rep.-elect Scott Tipton, both from Colorado, get their picture taken by a staff member on the steps of the Capitol building in Washington, on Friday, Nov. 19, 2010.