Historic Landmark

La Fortaleza and San Juan National Historic Site (Puerto Rico)

The Spanish system of fortifications in San Juan, Puerto Rico, is the oldest European construction in the United States and one of the oldest in the New World. These fortifications guarded the entrance to San Juan Bay, helped the Spanish maintain sovereignty over Puerto Rico, and protected Spanish commerce in the Caribbean basin.

Qhapaq Ñan, Andean Road System (Argentina, Bolivia, Chile, Colombia, Ecuador, Peru)

Qhapaq Ñan is an extensive Inca communication, trade and defense network of roads, covering more than 18,000 miles through one of the world’s most extreme geographical terrains, linking the snowcapped peaks of the Andes to the coast — running through hot rainforests, fertile valleys and absolute deserts.