Take Metro Line 1 from Gare de Lyon to Champs-Élysées - Clemenceau, transfer to Line 6 towards Charles de Gaulle - Étoile, get off at Bir-Hakeim. Walk to Eiffel Tower Gardens.
Catch the night bus line at Hotel de Ville stop, enjoy illuminated city sights including Notre Dame and Champs-Élysées. The service runs until 10:30pm.