More than 500 structures still stand throughout the city, and the guide details their different functions.

BBC: Sleep at the base of a Maya temple

Hoping to use the Banco Palmas model as a successful guide for other low-income communities throughout Brazil, the inhabitants of Conjunto Palmeira developed the Instituto Banco Palmas, which partnered with the National Secretariat of Solidarity Economy and the Banco Popular do Brasil in 2005.

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Throughout the tour, you can tell your guide where to make stops and where to just ride past, depending on your preference.

BBC: Seeing Barcelona by sidecar

Its mission will be to work with Congress as lawmakers consider legislation to create a new Department of Homeland Security and to "coordinate, guide and conduct transition and related planning" throughout the federal government in preparation for the establishment of the new massive federal agency, according to the executive order.

CNN: Ridge to head security transition office

Now, throughout this period of unrest and upheaval across the region the United States has maintained a set of core principles which guide our approach.

WHITEHOUSE: President Obama on the Situation in Libya

Guests may work as a team to guide their tire and, for extra fun, try to catch one of the inflatable balls scattered throughout the attraction.

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The manual has evolved over time from a relatively small guide for the collection of diagnostic prevalence data to the standard text for every course on psychiatric illness throughout the world.

CNN: Doctor: Why we're making changes to autism diagnosis