A golden goblet, with a handle shaped like an angel in flight.

Once per day, you can fill the World Cup with any liquid, and look into the reflection to view any location in the world which you have previously seen.  This includes having seen the location in any form (e.g. in a painting, on a map) but is viewed in the World Cup at the highest detail level the viewer has seen the location (if they have seen the location only in a painting, if is shown as if in a painting).  You can look upon this reflection for up to one minute before it fades.