Nestled in the heart of downtown, the Spanish Governor's Palace stands as one of San Antonio's oldest surviving landmarks and a reminder that South Texas played a key role in the nation's fight for independence.

"We are standing in the National Historic Landmark Spanish Governor's Palace," Colleen Swain said.

"It houses the original remnants of the 1722 presidio. It was the comandancia, which is the home and office of the Spanish garrison captain." The building has served many purposes over the past three centuries.