I haven’t really got a name for it.  Using the UNESCO World Heritage Lists (the regional lists published on Wikipedia are pretty in depth), pick out the places you’ve already been.

It’s pretty straight forward.  You could pick out the places you want to go, as well, except that for me that would be just about all of them…

World Heritage Sites in Europe that I’ve already visited:

• Frontiers of the Roman Empire (Hadrian’s Wall)
• Historic Centre of Rome and the Properties of the Holy See in that City Enjoying Extraterritorial Rights (Vatican City)
• Historic Centre of Prague
• Vatican City (separate entry from Historic Centre of Rome…)
• Venice and its Lagoon
• Archaeological Areas of Pompeii, Herculaneum and Torre Annunziata
• Amalfi Coast
• Bryggen (Bergen, Norway)
• Castles and Town Walls of King Edward I in Gwynedd: Harlech, Beaumaris, Caernarfon and Conway (Wales)
• City of Bath
• Liverpool
• Old Town and New Town of Edinburgh
• Stonehenge, Avebury and Associated Sites
• Tower of London
• Westminster Abbey, Palace of Westminster, Westminster School and St Margaret’s Church

World Heritage Sites in Australia that I’ve already visited:

• Fraser Island
• Greater Blue Mountains Area
• Kakadu National Park
• Sydney Opera House
• Gondwana Rainforests of New South Wales and Queensland

Not bad, could do better!