San Diego–Tijuana

San Diego–Tijuana shares 180 connections with 5469 places across 16 topics, spanning nature, transportation, and industry on both sides of the US-Mexico border. Nature connections cover coastal estuaries and lowland shrubs including sage species and succulents. The region's cross-border character appears in transportation ties, including the Cross Border Xpress, the only airport in the world with terminals in two countries. Strong overlaps run with Baja California and Tijuana on the Mexican side, and Los Angeles on the US side.