Question: Cabrillo National Monument commemorates the landing of the navigator who explored North America for what country?

Context paragraphs:
California State Route 209: State Route 209 (SR 209) was a state highway in the U.S. state of California, connecting Cabrillo National Monument with the interchange of Interstate 5 (I-5) and I-8 in San Diego, passing through the neighborhoods of Point Loma.  The majority of the route was along Rosecrans Street; it also included Cañon Street and Catalina Boulevard leading to the tip of Point Loma.

Hardy, Virginia: Hardy is an unincorporated community lying in Bedford County, Franklin County, and Roanoke County Virginia, United States, about twenty miles southeast of Roanoke.  The Booker T. Washington National Monument commemorates where Booker T. Washington was born in 1856.  Also the home place of Jubal Anderson Early on rt 116 near the bottom of windy gap mountain.

Juan Rodríguez Cabrillo: Juan Rodríguez Cabrillo, also known as João Rodrigues Cabrilho (born 1499, died January 3, 1543), was a navigator and explorer, known for exploring the West Coast of North America on behalf of the Spanish Empire.  Cabrillo was the first European to navigate the coast of present-day California in the United States.

Daniel Morgan Monument: Daniel Morgan Monument is a historic monument located at Spartanburg, Spartanburg County, South Carolina.  The statue was designed by John Quincy Adams Ward and the monument erected in 1881.  The monument commemorates the centennial of the victory at the Revolutionary War Battle of Cowpens and its hero, General Daniel Morgan.  The statue stands on a columnar granite shaft on an octagonal base designed by noted Charleston architect, Edward Brickell White.  In 1960, the monument was moved about 100 yards across Morgan Square to its east end.  However, in 2005 as part of a larger project involving the redesign and reconstruction of Morgan Square, the monument was returned to its original position at the corner of West Main and Magnolia Streets and its original orientation, facing Cowpens National Battlefield.

Gay Liberation Monument: The Gay Liberation Monument is a monument featuring the sculpture Gay Liberation by American artist George Segal, located in Christopher Park along Christopher Street in the West Village section of Manhattan, New York.  Located at the northern end of the park, the art installation commemorates the Stonewall riots and features four figures (two standing men and two seated women) positioned in "natural, easy" poses.  The bronze statues are covered in white lacquer, cast in 1980 from plaster moulds of human models.  Two "World's Fair-style" benches and a plaque are also part of the monument.  The monument was dedicated on June 23, 1992, and is part of the Stonewall National Monument.

Old Point Loma Lighthouse: The original Point Loma Lighthouse is a historic lighthouse located on the Point Loma peninsula at the mouth of San Diego Bay in San Diego, California.  It is situated in the Cabrillo National Monument.  It is no longer in operation as a lighthouse but is open to the public as a museum.  It is sometimes erroneously called the "Old Spanish Lighthouse", but in fact it was not built during San Diego's Spanish or Mexican eras; it was built in 1855 by the United States government after California's admission as a state.

Cabrillo State Marine Reserve: Cabrillo State Marine Reserve (SMR) is a marine protected area that extends off Cabrillo National Monument in Point Loma, San Diego County on California’s south coast.  The SMR covers .38 square miles.  The SMR protects marine life by limiting the removal of marine wildlife from within its borders.  Cabrillo SMR prohibits take of all living marine resources.

Military Working Dog Teams National Monument: The Military Working Dog Teams National Monument is a U.S. National Monument located at Lackland Air Force Base in San Antonio, Texas.  It was founded by John C. Burnam, published author and Vietnam Veteran Infantryman and German Shepherd Scout Dog Handler (1966-1968).  The monument was designed by the John Burnam Monument Foundation.  It represents all wars since World War II and all five U.S. Armed Services (Army, Marines, Navy Air Force, and Coast Guard).  The monument grounds encompass a 3,000 square feet granite plaza, granite pedestals, granite history wall, and granite benches.  The granite pedestals have large bronze statues of dogs and handlers.  Cost of construction was provided by corporate sponsors and public donations raised by the John Burnam Memorial Foundation.  The monument was dedicated during a formal military ceremony on October 28, 2013.  One of the inscriptions reads: "Dedicated to all U.S. Military Working Dog Handlers and their beloved dogs who defend America from harm, defeat the enemy, and save lives."

Aniakchak National Monument and Preserve: Aniakchak National Monument and Preserve is a U.S. National Monument and National Preserve, consisting of the region around the Aniakchak volcano on the Aleutian Range of south-western Alaska.  The 601294 acre monument is one of the least-visited places in the National Park System due to its remote location and difficult weather.  The area was proclaimed a National Monument on December 1, 1978, and established as a National Monument and Preserve on December 2, 1980.  The National Monument encompasses 137,176 acres and the preserve 464,118 acre .  Visitation to Aniakchak is the lowest of all areas of the U.S. National Park System, according to the NPS, with only 134 documented recreational visits in 2014.  Most visitors fly into Surprise Lake inside Aniakchak Crater, but the frequent fog and other adverse weather conditions make landing in the lake difficult.  It is also possible to fly into the nearby village of Port Heiden and proceed overland to the Aniakchak Crater.

Cabrillo National Monument: Cabrillo National Monument is at the southern tip of the Point Loma Peninsula in San Diego, California.  It commemorates the landing of Juan Rodríguez Cabrillo at San Diego Bay on September 28, 1542.  This event marked the first time a European expedition had set foot on what later became the West Coast of the United States.  The site was designated as California Historical Landmark #56 in 1932.  As with all historical units of the National Park Service, Cabrillo was listed on the National Register of Historic Places on October 15, 1966.

Supporting paragraphs: Cabrillo National Monument Juan Rodríguez Cabrillo
Answer: Spanish Empire