Thanks to Catoplayer for doing 13 POIs (and the core zones) for Las Medulas!
They 'explain' this slightly complicated site so well.

My POIs of the sites I visited on my Greece trip in August/September 2025

Rhodes
Palace of the Grand Master 36.44579403 28.224208334
Street oft he Knights 36.44507028 28.22609947
Church of the Virgin of the Burgh (ruins) 36.44286124 28.23084025
Cannon Gate - City Wall Walk Entrance 36.44542124 28.22353741
St. John's Gate - City Wall Walk Exit 36.44004264 28.22849174
Archeological Museum 36.44478248 28.22713911

Delphi
Temple of Apollo 38.48235209 22.50124028
Ancient Theatre 38.48255783 22.50052842
Ancient Stadium 38.4825825 22.49774894
Tholos of Athena Pronaia 38.48019551 22.50788804
Ancient Gymnasium 38.48149978 22.50593585
Archeological Museum 38.4803179 22.49959579

Olympia
Temple of Zeus 37.63793113 21.63027493743922
Ancient Stadium 37.63925842 21.6333796
Archeological Museum 37.64370162 21.62963523
Museum of History of the Ancient Olympic Games in Olympia 37.641211 21.62550898

Temple of Apollo Epicurius at Bassae
Andritsaina Public Historical Library with a plaster copy of the frieze of the Apollo Temple 37.483704 21.90879086

Mystras
Main Entrance 37.0753639 22.36954896
Upper Entrance 37.07256193 22.36453991
Peribleptos Monastery 37.07193704 22.37087161
Pantanassa Monastery 37.07335862 22.36889828
Holy Church of Hagia Sophia 37.07377248 22.36595977
Byzantine Palace 37.07476542 22.36659892
Mystras Castle 37.07203926 22.36721256
Metropolis Church 37.07583863 22.3688224

Mycenae and Tiryns
Lion's Gate 37.73091316 22.75649226
Vaulted Tomb of Clytemnestra 37.73065791 22.75508356
Treasury of Atreus 37.72680832 22.75406669
Archeological Museum 37.73175363 22.7564565

Sanctuary of Asklepios at Epidaurus
Ancient Theatre 37.59628793 23.07908654
Tholos 37.5985417 23.07412544
Archeological Museum 37.59681478 23.07796539

Acropolis Athens
Partheon 37.97156572 23.72654439
Beulé Gate 37.97165408 23.7246295
Viewpoint Arios Pagous Hill 37.97242061 23.72328453
Viewpoint Philipappou Hill 37.96743727 23.72178263
Acropolis Museum 37.96853398 23.72840235

Jakob did Lübeck: https://www.worldheritagesite.org/list/lubeck/

Will start adding these, hubert! Will add the core zones as well if I can.

Planing my Barcelona-Trip in two weeks time, I realized, that most of the Antoni Gaudi-POIs are incorrect. They are all northeast of the correct position. Here are the correct locations:

Sagrada Familia: should be at 41.403507 / 2.174424
Casa Milà "La Pedrera": should be at 41.395307 / 2.161867
Palacio Güell: should be at 41.378861 / 2.174126
Casa Vicens: should be at 41.403444 / 2.150687
Crypt at the Colonia Güell: should be at 41.363685 / 2.027779

Park Güell: is not really incorrect, but better would be at 41.414064 / 2.152443

Casa Batllo: is correct

While non-exhaustive, here are some of the points of interest for Guanajuato. Thus far, I've identified 21 POI's.

Historic Town of Guanajuato and Adjacent Mines (Mexico)

Museums: 4

- Diego Rivera's House Museum: 21.018304964504175, -101.2549710936344
- Museo Iconográfico del Quijote: 21.01449616501346, -101.25200305510988
- Alhóndiga de Granaditas Regional Museum: 21.018947305090677, -101.25733045006051
- Museo Ex Hacienda San Gabriel de Barrera: 21.009474465899874, -101.27245730727002

Cathedrals/Churches: 5

- Templo de San Cayetano Confesor: 21.0415482575034, -101.2573172397439
- Templo de San Francsico: 21.014195024437058, -101.25183765830599
- Templo de la Compañía de Jesús Oratorio de San Felipe Neri: 21.01743876307652, -101.25225840105396
- Templo De San Roque: 21.018023941436002, -101.25640203882664
- Basílica Colegiata de Nuestra Señora de Guanajuato: 21.016610564850158, -101.25307745490726

Fountains: 2

- Fuente San Fernando: 21.017605813716976, -101.25595410996402
- Fuente del Baratillo: 21.01658383970448, -101.25192412194066

Viewpoints: 3

- Funicular: 21.014997601912867, -101.25308457922885
- Monumento Al Pipila: 21.014574299841193, -101.25405396988297
- Mirador de Rayas: 21.028016700589642, -101.24765110120478

Public Works / Secular Architecture: 4

- University of Guanajuato: 21.017204573012247, -101.25339355292328
- Teatro Juarez: 21.01551906733267, -101.2527264938044
- Teatro Cervantes: 21.013392930627468, -101.2504006803832
- Mercado Hidalgo: 21.017495014170372, -101.25807949877576

Mining: 3

- Bocamina San Ramón: 21.043585605043667, -101.25808662836508
- Museo Mina Valenciana 1791: 21.040396624052008, -101.2603831170566
- Mina de Guadalupe: 21.040426664602414, -101.25986813295874

For any other people within our community, am I missing anything else worthwhile?

While non-exhaustive, here are some of the points of interest for Querétaro. Thus far, I've identified 21 POI's.

Historic Monuments Zone of Querétaro (Mexico)

Cathedrals / Churches: 7

- Templo de Santa Rosa de Viterbo: 20.588463063448447, -100.39429480877536
- Temple of St. Dominic: 20.589955264875886, -100.39486289694968
- Catedral de Querétaro, San Felipe Neri: 20.591654121022884, -100.39548224714578
- Templo de San Francisco: 20.592954828685045, -100.39127832406805
- Ex Convento Santa Clara de Jesús: 20.592302290653308, -100.39445497911571
- Santuario y Convento de la Santa Cruz de los Milagros: 20.593174132961128, -100.38351497172529
- Templo de San Antonio de Padua: 20.594682390725676, -100.39155352981564

Gardens & Fountains: 4

- Alameda Hidalgo: 20.588078045151647, -100.38750553589789
- Jardín Guerrero: 20.592048696196855, -100.39492168348615
- Jardín Zenea: 20.593078490842547, -100.39201421466107
- Fuente de Neptuno: 20.592013898669162, -100.39373753751009

Secular Architecture / Public Monuments: 4

- Hotel La Casa De La Marquesa: 20.591959991496438, -100.39337246294001
- Casa de La Corregidora: 20.593390417037053, -100.38996721886897
- Pantheon of Illustrious Queretanos: 20.592551913150558, -100.37996842438054
- Acueducto De Queréretato: 20.591993634468317, -100.37949598321916

Museums: 6

- Museo de Arte de Querétaro: 20.5912854948782, -100.39277418410825
- Museum of Contemporary Art of Queretaro: 20.59276486880297, -100.3838717055014
- Museo Casa de la Zacatecana: 20.59254480972771, -100.388280903079
- Museo Regional de Querétaro: 20.592773474532983, -100.39102663124365
- Museo de Arte Sacro: 20.59224311118979, -100.39374123446402
- Centro Queretano De La Imagen (Casa De Los Leones): 20.5894605687742, -100.3906172841603

For any other people within our community, am I missing anything else worthwhile?

Just a note - try not to be too exhaustive, it is more about what you would recommend a friend to visit when going to a site. Things like gardens and regional museums usually aren't that interesting (they may be in this case, but you'd have to explain why)

It would be good here for example to recommend one that is actually good for visiting. From the other reviews, another one (Bocamina de San Cayetano) was recommended by Frederic (have added it to the map)

Plaque of Forth Bridge: The map of Forth Bridge shows a plaque located in North Queensferry, but there is also a plaque in South Queensferry. It is on the "Forth bridges viewing platform", approx. lat 55.9881668488322, long -3.4032177283742615. I don't have a photo of it myself, but if you want to see it, you can find it on internet, for example here: https://www.theforthbridges.org/about-the-forth-bridges/forth-bridge/unesco-world-heritage-site/

A little more on plaque coordinates, because something may have gone wrong in the conversions of coordinates for a few plaques:

Royal Saltwork of Arc-et-Senans: the plaque shows up a long way to the right in the middle of a river. It should be on the field along the path to the entrance: lat 47.03196796100954, long 5.778520437061889.

Fortified City of Carcassonne: It shows now inside the walls, but it is outside the Porte Narbonaisse where the bridge starts: 43.2065866027838 / 2.3659514033364992.

Chartres Cathedral: the plaque shows a few streets to the left, but if I remember correctly it is (almost hidden) somewhere on a wall in the garden outside of the sanctuary-side of the church, around 48.4482456910401 / 1.4878025031618725.

And finally, I believe that the plaque at the Castra of Saalburg (Frontiers of the Roman Empire) is on the wrong side of the grounds. It is outside the main entrance at 50.27056827685976 / 8.567174084235237.

Hope this helps!

Thanks JanWillem, they have been changed!

The location of plaque 5 at Housesteads for Frontiers of the Roman Empire ("pink metal plaque, including all elements, just to the right of the entrance to the museum") is slightly wrong. It's currently located at 55.0097817,-2.3241367, but that's the visitor centre not the museum. It should be at 55.012183,-2.331594, the museum (where I have seen it).

I've also just uploaded a photograph of that plaque.

Tokaji Wine Region

Point of Interest (Core Zone): Koporosi Pincesor
Hercegkut, 3958

Point of Interest (Core Zone): Rakoczi Pince
Tokaj, Kossuth ter 15, 3910

Aggtelek and Slovak Karst

Point of Interest (Core Zone): Domica Cave