The Panteón de los Héroes is a mausoleum housing the remains of important figures of Paraguayan history, including Don Carlos Antonio López (First President), Mariscal Francisco Solano López, Mariscal José Félix Estigarribia. en.wikipedia.org/wiki/National_Pantheon_of_the_Heroes
In addition to the Government Palace and the Cathedral de Nuestra Senora de la Asuncion, the Panteon Nacional de los Heroes is also worth seeing. It is located right in the center of Asuncion. It is a small monument. The changing of the guard is nice to look at.