I thought I had done this before, but could not find it, so I'm listing them again, mostly for my own reference. 37
World Heritage Sites that I've visited:
Australia
Wet Tropics of Queensland
Canada
Head-Smashed-In Buffalo Jump
Canadian Rocky Mountain Parks
Estonia
Historic Centre (Old Town) of Tallinn
Struve Geodetic Arc
Germany
Aachen Cathedral
Cologne Cathedral
Zollverein Coal Mine Industrial Complex in Essen
Ireland
Brú na Bóinne - Archaeological Ensemble of the Bend of the Boyne
Italy
City of Verona
Padua’s fourteenth-century fresco cycles
Venice and its lagoon
Latvia
Historic Centre of Riga
Russia
Historic Centre of Saint Petersburg and Related Groups of Monuments
St. Lucia
Pitons Management Area
United Kingdom
Canterbury Cathedral, St Augustine's Abbey, and St Martin's Church
Castles and Town Walls of King Edward in Gwynedd
City of Bath
Cornwall and West Devon Mining Landscape
Maritime Greenwich
Old and New Towns of Edinburgh
Stonehenge, Avebury and Associated Sites
Tower of London
Westminster Palace, Westminster Abbey and Saint Margaret's Church
United States
Everglades National Park
Grand Canyon National Park
Great Smoky Mountains National Park
Hawaii Volcanoes National Park
Independence Hall
Kluane/Wrangell-St. Elias/Glacier Bay/Tatshenshini-Alsek
La Fortaleza and San Juan National Historic Site in Puerto Rico
Mammoth Cave National Park
Monticello and the University of Virginia in Charlottesville
Redwood National and State Parks
The 20th-Century Architecture of Frank Lloyd Wright
Waterton Glacier International Peace Park
Yellowstone National Park