Urchin Seasands, or World 2-6, is the third level of Rubble Ruins. It takes place in a sandy lake filled with Urchins.
- Star Coin #1: Hit the only P-Switch in the level (that not only turns bricks into coins and makes blue coins, but changes the water currents in the pipes), then go into the green pipe trailed by the blue coins. The Star Coin is inside.
- Star Coin #2: After a long series of Urchins after the checkpoint, the player must jump upon two platforms, with the Star Coin on the top one.
- Star Coin #3: Some ways after, dangerously placed just above the middle Mega Urchin.
- Cheep Cheep
- Big Cheep Cheep
- Huckit Crab
- Koopa Troopa
- Koopa Paratroopa
- Mega Urchin