World 6-6 (Super Mario Bros. 3)

World 6-6 is the sixth main level and the seventh level overall in Ice Land from Super Mario Bros. 3. This level is an underground level, but takes place mostly underwater.

Layout
The level starts with a Warp Pipe that sends Mario to the underground area. In the underground area, there are stairs which can be used to reach a small area with a jumping Cheep-Cheep, a Spike, and a Fire Flower. Next, there is a Wood Block with a Starman, another jumping Cheep-Cheep, and Piranha Plants. Next, there is a big underwater area with Cheep-Cheeps, 1-Up Mushroom, and another Fire Flower. In the end of the underwater area, there are a few Piranha Plants, which can be easily defeated with Fire Mario. After the underwater area, there are more Spikes, and a Warp Pipe which warps Mario to the goal.

Level statistics

 * Power-ups: 3 (two Super Mushroom or Fire Flower, and one Starman)
 * 1-Up Mushrooms: 1
 * Secret areas: 0