There are numerous relics of the Spanish-Cuban-American War throughout the U.S. All the captured Spanish cannons adorn numerous parks and public places. Here are a few
http://www.latinamericanstudies.org/spanwar1.htm
Likewise, souvenirs of the U.S.S. Maine are also found throughout the U.S.
http://www.latinamericanstudies.org/maine5.htm
Pittsburgh
http://www.latinamericanstudies.org/maine-torpedo.htm
Washington D.C.
http://www.latinamericanstudies.org/washington-maine.htm
and Key West
http://www.latinamericanstudies.org/maine-sight.htm
Some of the USS Maine sailors mortally wounded in the explosion in Havana were buried in Key West
http://www.latinamericanstudies.org/maine-memorial.htm
The rest are interred in Arlington National Cemetery
http://www.latinamericanstudies.org/maine-arlington.htm
More details on the Spanish-Cuban-American-War are at
http://www.latinamericanstudies.org/spanwar.htm