Third: The Mexican government invested significantly in transportation improvements making Puerto Vallarta an easy travel destination. To make Puerto Vallarta accessible by jet aircraft the government developed the City's international airport. Ground transportation significantly improved. Government invested heavily in the development of highway and utility infrastructure. Another vital improvement for the city was the El Salado wharf (where the current cruise terminal is located), inaugurated on June 1, 1970, making Puerto Vallarta the first harbor town in Jalisco. Improvements and investment in infrastructure led to Puerto Vallarta experiencing tourist booms, starting in the late 1960s. While tourists from the United States and Canada started flowing in, tourists in Puerto Vallarta were principally from Mexico, who started traveling to Puerto Vallarta because the improved infrastructure (4-lane paved highways) made travel easy and convenient (e.g., Guadalajara and Puerto Vallarta).