Title: Monument to the Victims of the USS Maine (Havana)
Content:  In January 1898, Maine was sent from Key West, Florida, to Havana, Cuba, to protect U.S. interests during the Cuban War of Independence. Three weeks later, at 21:40, on 15 February, an explosion on board Maine occurred in the Havana Harbor (23.13528°N, -82.33417°W). Later investigations revealed that more than 5 LT of powder charges for the vessel's six- and ten-inch guns had detonated, obliterating the forward third of the ship. The remaining wreckage rapidly settled to the bottom of the harbor. Most of Maines crew were sleeping or resting in the enlisted quarters, in the forward part of the ship, when the explosion occurred. In total, 260 
Title: USS Maine (1889)
Content:  in American warship design, reflecting the latest European naval developments. Both ships had two gun turrets staggered en échelon, and full masts were omitted due to the increased reliability of steam engines. Due to a protracted 9-year construction period, Maine and Texas were obsolete by the time of completion. Far more advanced vessels were either in service or nearing completion that year. Maine was sent to Havana Harbor to protect U.S. interests during the Cuban War of Independence. She exploded and sank on the evening of 15 February 1898, killing 268 sailors, or three-quarters of her crew. In 1898, a U.S. Navy board of inquiry ruled that the ship had been sunk by an external explosion from a mine. However, some U.S. Navy officers disagreed with the 
Title: USS Maine (1889)
Content:   Maine was a United States Navy ship that sank in Havana Harbor on February 15, 1898, contributing to the outbreak of the Spanish–American War in April. American newspapers, engaging in yellow journalism to boost circulation, claimed that the Spanish were responsible for the ship's destruction. The phrase, "Remember the Maine! To hell with Spain!" became a rallying cry for action. Although the Maine explosion was not a direct cause, it served as a catalyst that accelerated the events leading up to the war. Maine is described as an armored cruiser or second-class battleship, depending on the source. Commissioned in 1895, she was the first U.S. Navy ship to be named after the state of Maine. Maine and the similar battleship USS Texas (1892) were both represented as an 
Title: USS Maine (1889)
Content:  steamship, aided in rescuing the crew.  In January 1898, Maine was sent from Key West, Florida, to Havana, Cuba, to protect U.S. interests during the Cuban War of Independence. Three weeks later, at 21:40, on 15 February, an explosion on board Maine occurred in the Havana Harbor (23.13528°N, -82.33417°W). Later investigations revealed that more than 5 LT of powder charges for the vessel's six- and ten-inch guns had detonated, obliterating the forward third of the ship. The remaining wreckage rapidly settled to the bottom of the harbor. Most of Maines crew were sleeping or resting in the enlisted quarters, in the 
Title: USS Maine Mast Memorial
Content:  The USS Maine was one of several new battleships and other warships built by the United States Navy after 1884 to modernize the fleet. The Maine was launched on November 18, 1889, and commissioned on September 17, 1895. She was part of the North Atlantic Squadron for nearly all of her career. On January 25, 1898, the Maine was sent from Key West, Florida, to Havana, Cuba, to protect American citizens and interests during the Cuban War of Independence. At 9:40 p.m. local time on February 15, an explosion on board Maine destroyed and sank the ship. More than 5 ST of powder charges in 
Title: USLHT Mangrove
Content:  After USS Maine (ACR-1) – a United States Navy second-class battleship – exploded and sank while at anchor in the harbor at Havana, Cuba, on the evening of 15 February 1898, Mangrove transported wounded survivors of the disaster to Key West. In March 1898, while anchored in Havana Harbor, she served as a site for the U.S. Navy court of inquiry into the loss of Maine. She later made a voyage in which she carried guns salvaged from Maine′s wreck and civilians evacuating Cuba to the United States as the Spanish–American War broke out in April 1898. On 10 April 1898, shortly before the war broke out, Mangrove was transferred to the U.S. Navy for war service. Armed with two quick-firing guns, she was commissioned into the U.S. Navy as USS Mangrove. She operated as an armed supply ship during the war.
Title: Largest artificial non-nuclear explosions
Content:  On 15 February 1898, more than 5 tons of gunpowder exploded on the USS Maine in the Havana Harbor, Spanish Cuba, killing 266 on board. Spanish investigations found that it was likely started by spontaneous combustion of the adjacent coal bunker or accidental ignition of volatile gases. The 1898 US Navy investigation laid the blame on a mine, which led to public outrage in the United States and support for the Spanish–American War.
Title: Havana Harbor
Content:  The sinking of the U.S. battleship Maine in Havana Harbor in 1898 was the immediate cause of the Spanish–American War.  In January 1898 the USS Maine, the largest vessel to come out of an American shipyard, was dispatched to Cuba to protect US interests there. At the time more than 8,000 US citizens resided in the country, and their safety could not be assured in the state of affairs at that time. On February 15, 1898 the Maine exploded and sank in the harbor. It became a major rallying call for the Spanish–American War, and it caused the US to finally intercede on Cuba's behalf. In 1912 the wreck was removed from the harbor as it was posing a hazard to navigation. It was sunk in deep water in the Gulf of Mexico with proper military ceremonies.
Title: USS Amphitrite (BM-2)
Content:  hold. We found ourselves in the open sea looking for an enemy who could steam at the speed of sixteen to eighteen knots while we could barely maintain seven. The prospect of catching him was not very bright. However, we were doing our best with the tools the Government had given us to work with ..." In February 1898, tensions between the United States and Spain served as the backdrop for the explosion, in Havana Harbor, of the armored cruiser USS Maine (ACR-1). As the U.S. and Spain moved toward war, a flurry of orders began deploying the United States Navy to be 
Title: Battleship Maine Monument
Content:  The USS Maine was an armored cruiser of the United States Navy, and was the first US Navy vessel named after the state of Maine. She was sent in January 1898 to Havana, Cuba as a precautionary measure to ensure the safety of Americans in the ongoing Cuban War of Independence. On February 15, 1898, an explosion (whose cause continues to be debated) aboard the ship resulted in its rapid sinking, and the loss of three-quarters of its crew. This event greatly heightened tensions that led directly to the outbreak of the Spanish–American War. Elements of the ship were recovered during salvage operations in 1912, a number of which now appear in monuments and memorials to the war. Bangor Mayor Flavius O. Beal and Congressman Frank E. Guernsey successfully lobbied for the city's receipt of the ship's shield and scrolls, which were to become the focus 

Question: where was the u.s.s maine when it exploded in 1898?
Answer: Havana Harbor.