Lavacast

A lavacast is a structure made of cobblestone created by pouring water over lava, generally used to quickly grief a large area. Lavacasts are what give spawn its easily recognizable appearance. They most often resemble mountains or pyramids but can take on many different shapes depending on the manner in which they were created. Lavacasts often contain small air pockets. They are also sometimes used to create walls or large structures in general. A rare but well-known usage of lavacasts is to create huge symbols, the most famous example of which is the giant cobblestone swastika. The word itself is also commonly used as a verb (eg: "He lavacasted the base.")

History
There are no records of lavacasts at spawn in 2010. xcc2, a 4channer who joined in early 2011, claims that spawn was not lavacasted in early 2011 and that the very first lavacast he saw was at NFE, several months after he joined. This would have been in early to mid-2011.

Spawn began to get lavacasted in 2011, and Hausemaster began using WorldEdit to flatten the lavacasts by January 2012.

Notable lavacasts

 * Wrath Outpost
 * NFE
 * The Penny Dropper
 * Gape Group
 * Jared Town
 * Squid Base
 * Old Town
 * Fort Creatonism Corner
 * 2k2k
 * Valley of Wheat (itself considered to be the second greatest grief apart from spawn)
 * 200 150 (Armorsmith's Spawn Base)
 * -300 -300 (Octocast)

Highway milestones

 * 1 million +X milestone
 * 1 million -Z milestone