These are the complete maps of the original Super Mario Bros. for the NES.

Update April 11^th, 2005: Thanks to BlueRaja for pointing out a missing 1-up in level 8-1. The map has been updated.
Update June 19^th, 2005: Thanks to DDCecil for finding missing 1-ups in 2-1, 4-1, 5-1 and 7-1 (sheesh, I must be really sloppy!). Maps updated.
Update March 1^th, 2006: Yes, I know about the minus world; no, I'm not gonna map it.

World 1	Level 1-1	Level 1-2	Level 1-3	Level 1-4
World 2	Level 2-1	Level 2-2	Level 2-3	Level 2-4
World 3	Level 3-1	Level 3-2	Level 3-3	Level 3-4
World 4	Level 4-1	Level 4-2	Level 4-3	Level 4-4
World 5	Level 5-1	Level 5-2	Level 5-3	Level 5-4
World 6	Level 6-1	Level 6-2	Level 6-3	Level 6-4
World 7	Level 7-1	Level 7-2	Level 7-3	Level 7-4
World 8	Level 8-1	Level 8-2	Level 8-3	Level 8-4

• Bonus area A — Underground coins
• Bonus area B — Underground coins
• Bonus area C — Underground coins
• Bonus area D — Underground coins
• Bonus area E — Underground coins
• Bonus area F — Underwater area
• Bonus area G — Underwater area (same as F with smaller platforms)
• Bonus area H — Cloud area
• Bonus area I — Cloud area
• Bonus area J — Warp to worlds 6, 7, and 8.
• Bonus area K — Cloud area (same as I with smaller platforms)

• Underground level transition — The brief non-playable screen where Mario walks into a pipe to enter an underground or underwater level.
• Underground end of level — This area concludes all underground or underwater levels.

• Download a wallpaper of all the maps, one after the other, and reduced in size to fit your desktop. Choose your desktop size: 640×480, 800×600, 1024×768, 1280×1024, 1600×1200

For those interested, these maps were created using FCEU, a free Nintendo emulator for Windows. I used the ROM image for the Mario/Duck Hunt version of the game. Screen captures were tediously pieced together in Photoshop. Some text was reproduced using the Press Start font by codeman38, which emulates the same font used in SMB. Some Game Genie codes were used to make mapping easier, including high jumps, 900-tick timer, and invincibility. I noticed no side effects from these cheats, so the maps should not be any different due to the use of these codes. A future project may be to stitch all these maps together into one long, narrow, continuous map, but that may be a ways off. (I experimented with this and it looks awful). If you want more information about how I created these, feel free to ask.