Here are the points of interests in Brussels and how to get to them by public transportation. We will use Gare du Midi Station as the starting point since it is one of the main hubs and it has 4 Metro Lines crossing it.
Atomium - take Metro Line 6 to Heysel Station
Basilica of the Sacred Heart - take Metro Line 3 or 4 to Rogier Station then ride Bus 214 to Ganshoren H. Hart College
Belgian Comic Strip Center - take Metro Line 3 or 4 to De Brouckere Station then walk about a quarter-mile
Chinese Pavilion - take Metro Line 3 to Araucaria Station
Galeries Royales Saint-Hubert - take Metro Line 3 or 4 to De Brouckere Station then walk about a quarter-mile
Grand Place - take Metro Line 3 or 4 to Bourse Station then walk about a quarter-mile
Horta Museum - take Metro Line 3 or 4 to Horta Station then walk about a mile
Japanese Tower - take Metro Line 3 to Araucaria Station
Jeanneke Pis - take Metro Line 3 or 4 to De Brouckere Station then walk about a quarter-mile
Luxembourg Square - take Metro Line 3 or 4 to Bourse Station then ride Bus 27, 38 or 95 to Luxembourg Station
Manneken Pis - take Metro Line 3 or 4 to Bourse Station then walk about a quarter-mile
Mini-Europe - take Metro Line 6 to Heysel Station
Palace of Justice - take Metro Line 2 or 6 to Louise Station
Parlementarium/European Parliament Esplanade - take Metro Line 3 or 4 to Bourse Station then ride Bus 27, 38 or 95 to Luxembourg Station
Planetarium - take Metro Line 6 to Heysel Station
Royal Greenhouses of Laeken - take Metro Line 3 to Araucaria Station then walk about a mile
Royal Palace - take Metro Line 2 or 6 to Trone Station
St. Michael and St. Gudula Cathedral - take Metro Line 3 or 4 to De Brouckere Station then transfer to Metro Line 1 or 5 to Central Station
Brussels Metro Line Map is below: