• ::portal - list all categories, plus your recent and the server's popular destinations.
• ::portal <category> - show destinations in a category (each has a key + danger level).
• ::portalto <key> - teleport to a destination.
• ::portalback - instantly re-cast your last teleport.

Your previous teleports are remembered per character, and there's a server-wide "popular now" list. Note: teleblock and combat lock stop portal use (standard rules) - but ::home always works.