Obelisk

Obelisk is a Structure surrounding the Pig King. It is used as a decoration around the Pig King, but it also acts as an indicator of the sanity level of a player.

In Adventure Mode, Obelisk acts as a road barrier. Normally, Obelisk will only show its upper part on the ground, while lower part is hidden underground. This forms a little black pyramid and a player can pass through it without any obstacles. If your are in extreme insane (about 30 sanity level), obelisk will rise up and form a geographical barrier. This will stop the player from passing through Bridges until his sanity level is restored (higher than 30). Therefore, it will be dangerous if a player is stuck between the Obelisks when his sanity is very low.