Puerto Vallarta has become a popular retirement destination for US and Canadian retirees. This has created a number of neighborhoods within the Puerto Vallarta region that cater primarily to real estate tourism, such as the Hotel Zone, which stretches from downtown Vallarta to the airport and Marina Vallarta (near the airport), and Amapas and Conchas Chinas, which are built into the mountain slightly south and behind Puerto Vallarta, and overlook the city and bay. Most recently the downtown area, especially in Emiliano Zapata, (also known as the Romantic Zone), a somewhat controversial trend has commenced where traditional homes are being razed for the construction of condominium buildings. This region in recent years has been the most popular for Vallarta real estate tourism with nearly 25% of all real estate sales for the region taking place here in 2019. Controversial construction of condominium towers has also been taking place along the coastline heading south in Conchas Chinas and along the South Shore.