1-7

1-7 can refer to the following:
 * World 1-7 from various games
 * Level 1-7 from various games
 * Stage 1-7 from Donkey Kong for the Game Boy
 * Ladida Plains 1-7 from Super Princess Peach
 * Area 1-7 from Mario vs. Donkey Kong: Mini-Land Mayhem!

1-7