The Redondo Peninsula is a short mountainous peninsula extending about 15 kilometers (9 miles) to the south of Zambales on western Luzon in the Philippines.

It separates Subic Bay and the coasts around the Subic Bay Metropolitan Area of Subic and Olongapo from the South China Sea. It is known for its secluded coves, beaches and pine-forested mountains.

In 1542, Spanish conquistador Juan de Salcedo sailed into Subic Bay but no port developed there because the main Spanish naval base would be established in the nearby Manila Bay. When the British captured this base in 1762, the Spanish were forced to find an alternate location and Subic Bay was found to be a strategic and superb port location. In 1884, King Alfonso XII of Spain decreed that Subic was to become "a naval port and the property appertaining thereto set aside for naval purposes."

The Americans captured the Spanish base in 1899 during the Philippine–American War, and controlled the bay until 1991. During this period, the naval facilities were greatly built up and expanded, including a new naval air station that was built in the early 1950s by slicing the top half from a mountain and moving the soil to reclaim a part of Subic Bay.

Following the destruction of the 1991 Mount Pinatubo eruption, the Americans closed the base, and the area was transformed into the Subic Bay Freeport Zone.

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