Solid Block is the term for a block which the player cannot walk through. Most block types are solid, while most plant types are not. Cacti, wood, pumpkins, grass, and leaves are all examples of solid plant blocks. Ladders may not seem solid, but it is possible to stand atop them without descending. Both water and lava are not solid, and can be passed through (although passing through lava will deal damage to the player). Every type of solid block, with the exceptions of bedrock, leaves, grass, bookshelves, glass and ice can be destroyed and collected. Solid blocks are found both in the overworld and in The Nether. Most miniature items are also able to stop a Minecart from moving ahead. The only exception is Soul Sand in that when you step on to it your speed is slowed and you'll sink slightly into it, making it a half solid block. Soul Sand has other characteristics different to normal blocks such as when it's placed on top of ice or in water its slowing effects are strengthened. These characteristics make it an abnormal solid block.