He keynoted the Festival de Software Libre 2013, in Puerto Vallarta, Mexico.
Places such as Cancún, Riviera Maya, Galápagos Islands, Punta Cana, Chichen Itza, Cartagena de Indias, Cabo San Lucas, Mexico City, Machu Picchu, Margarita Island, Acapulco, San Ignacio Miní, Santo Domingo, Buenos Aires, Salar de Uyuni, Rio de Janeiro, Punta del Este, Labadee, San Juan, São Paulo, La Habana, Panama City, Iguazú Falls, Puerto Vallarta, Poás Volcano National Park, Viña del Mar, Guanajuato City, Bogotá, Santa Marta, San Andrés, San Miguel de Allende, Lima, Guadalajara, Cuzco, Ponce and Perito Moreno Glacier are popular among international visitors in the region.
One of these, which was co-written with Manuel Vallarta, was titled "The Scattering of Cosmic Rays by the Stars of a Galaxy".
Vallarta let his student in on a secret of mentor-protégé publishing: the senior scientist's name comes first.
Feynman had his revenge a few years later, when Heisenberg concluded an entire book on cosmic rays with the phrase: "such an effect is not to be expected according to Vallarta and Feynman".
When they next met, Feynman asked gleefully whether Vallarta had seen Heisenberg's book.
Vallarta knew why Feynman was grinning.
Puerto Vallarta (Spanish pronunciation: [ˈpweɾto βaˈʎaɾta], PV or simply Vallarta) is a Mexican beach resort city situated on the Pacific Ocean's Bahía de Banderas in the Mexican state of Jalisco.
The City of Puerto Vallarta is the government seat of the Municipality of Puerto Vallarta which comprises the city as well as population centers outside of the city extending from Boca de Tomatlán to the Nayarit border (the Ameca River).
Puerto Vallarta is named after Ignacio Vallarta, a former governor of Jalisco.
In Spanish, Puerto Vallarta is frequently shortened to "Vallarta", while English speakers call the city P.V. for short.
Puerto Vallarta's proximity to the Bay of Banderas, the agricultural valley of the Ameca River, and the important mining centers in the Sierra have given the town a more interesting past than most Mexican tourist destinations.
Puerto Vallarta was a thriving Mexican village long before it became an international tourist destination.
During the 19th century the history of Puerto Vallarta, then called El Carrizal or Las Peñas, was linked to the history of the Sierra towns of San Sebastián del Oeste, Talpa de Allende and Mascota.
During the 18th century, as Mascota grew, Puerto Vallarta grew with it, transforming itself from a small fishing and pearl-diving village into a small beach-landing port serving the Sierra towns.
At the time the main port serving Jalisco was located at San Blas, but the inconvenient overland route from San Blas to the Sierra towns made Puerto Vallarta a more convenient alternative for smaller shipments, not to mention smuggling operations which evaded the tax collectors at San Blas.
Puerto Vallarta also became a vacation destination for residents of the Sierra Towns, and by the mid 19th century, the town already had its regularly returning population of vacationers.
Most of the early settlers in Puerto Vallarta were families who had left the Sierra towns for one reason or another.
The official founding story of Las Peñas and thus of Puerto Vallarta is that it was founded by Guadalupe Sánchez Torres, on 12 December 1851, as Las Peñas de Santa María de Guadalupe.
As such 1859 marks the beginning of Puerto Vallarta as a village.