I’ve visited the sites marked with an asterisk * and can recommend them. But since things change over time, I’d suggest researching sites online when planning your itinerary. (This page is best viewed on a computer or laptop.)
Country
City
Site
Japan
Tokyo
Koriyama Station by Haruya Kudo
Jordan
Madaba
Byzantine Church, Map of Madaba
Jordan
Madaba
Archaeological Park and Mosaic School
Jordan
Madaba
Archaeological Museum
Jordan
Madaba
Hippolytus Hall
Jordan
Jerash
Archaeological Museum and Site
Jordan
Mount Nebo
Archaeological Museum and Site
Jordan
Qasr al-Hallabat
Umayyad Castle
Jordan
Jericho
Hisham Palace
Jordan
Jericho
Khirbet-el-Mafjar
Lebanon
Beirut
Beit el Din Palace
Lebanon
Baalbek
Palace of Diocletian Spaleto
Libya
Zliten
Roman Villa
Mexico
Mexico City
University City Library* by Juan O’Gorman
Mexico
Mexico City
Faculty of Medicine* by Eppens
Mexico
Mexico City
National Museum of Anthropology*
Morocco
Near Moulay Idris
Ancient site of Volubilis*
Netherlands
Ooosterhout
Theatre de Bussel, by Bas Degroot
New Zealand
Auckland
Third Column
New Zealand
Auckland
Marsden Wharf*
New Zealand
Auckland
Western Park, Ponsonby Road*
New Zealand
Kawakawa
Public Toilets (Hundertwasser)*
New Zealand
Tauranga
City streets
New Zealand
Taupo
Clay Art Studio*
Oman
Muscat
Golden Dome, mosque*
Portugal
Coimbra
Conimbrega
Romania
Costanta
National History and Archaeology Museum
Russia
Moscow
Tretyakov State Gallery
Russia
St Petersburg
Church of the Savior on Spilled Blood*
Russia
St Petersburg
Cathedral of St Isaac*
Spain
Cordova
Cathedral
Spain
Cordova
Great Mosque, Mihrab
Spain
Empurias
Ancient Site*
Spain
Barcelona
Palau de Musica Catalonia*, by Lluis Bru
Spain
Barcelona
Casa Batllo*, by Gaudi
Spain
Barcelona
Casa Mila*, by Gaudi
Spain
Barcelona
Church of the Sagrada Familia*, by Gaudi
Spain
Barcelona
Park Guell*, by Gaudi & Jujo
Spain
Barcelona
Museu d’Arqueologia de Catalunya*
Spain
Merida
Museo Nacional de Arte Romano*
Spain
Merida
Cosmological mosaic, ancient site of Mithraeum House*
Spain
Seville
Ancient site of Italica*
Spain
Seville
Museo Arqueológico de Sevilla
Spain
Tarragona
Mausoleum of Centcelles
Spain
Tossa de Mar
Roman villa of Ametllers
Spain
Madrid
Museo Arqueológico Nacional*
Sweden
Stockholm
City Hall by Einar Forseth
Switzerland
Fribough
Villa at Vallon
Syria
Damascus
Mosque of Omayyads
Syria
Damascus
Baybars’ Mausoleum
Syria
Damascus
Mausoleum of Tankiz
Syria
Damascus
Damascus Museum
Syria
Damascus
The Great Mosque
Syria
Apamea
Ancient site
Tunisia
Tunis
The Bardo Museum*
Tunisia
Carthage
Musee de Carthage*
Tunisia
Carthage
Archaeological site*
Tunisia
Bulla Regia
Archaeological site
Tunisia
El Djem
Musee d’ El Djem*
Tunisia
Sousse
Archeological Museum*
Tunisia
Sfax
Archeological Museum
Turkey
Istanbul
Kariye Musezi (the Chora)*
Turkey Istanbul Great Palace (Buyuk Saray Mosaic Museum)*
Turkey Istanbul Hagia Sophia*
Turkey Istanbul Fethiye (The Virgin Pammakaristos)*
Turkey Istanbul Archaeological Museum*
Turkey Adana Adana Museum
Turkey Antakya Hatay Archaeological Museum*
Turkey Antakya Villa of Constantine
Turkey Gaziantep Zeugma Mosaic Museum*
Turkey near Belkis Ancient site of Zeugma
Turkey
Ephesus
Ancient site
Turkey
Ephesus
Museum
Turkey
Sanliurfa
Ancient site of Haleplibahce