11 facts about San Antonio's Spanish missions

Click ahead to learn about the park's history and significance. Click ahead to learn about the park's history and significance. Image 1 of / 51 Caption Close 11 facts about San Antonio's Spanish missions 1 / 51 Back to Gallery

Visitors to San Antonio's Spanish missions can now say they are visiting two National Park Service sites at once.

The San Antonio Missions National Historical Park, along with former senator Kay Bailey Hutchison and Judge Nelson Wolff, unveiled signs this week that designate the missions as part of El Camino Real de los Tejas National Historical Trail, according to the park's Facebook page.

The trail runs from the Rio Grande to Louisiana and includes American Indian routes that Spaniards used to establish missions and presidios in the area. According to the park's website, the trail brought cultural innovations into Texas through three historic periods: Spanish colonial, Mexican and Anglo-American.

October is also Texas Archaeology Month. To celebrate, the park is hosting Archaeology Day on Saturday, Oct. 18, from 10 a.m. to 2 p.m. The free activities include sifting through a mock dig to find artifacts, writing in ancient languages and learning how Native Americans made tools. Visit nps.gov/saan or call (210) 932-1001 for more information.

Click through the slideshow above for more facts about the San Antonio Missions National Historical Park.