Following is a collection of the UNESCO World Heritage Sites that I visited.
All pictures are © Dr. Günther Eichhorn, unless otherwise noted.
Australia
Great Barrier Reef

Sydney Opera House

Greater Blue Mountains Area

البحرين (Bahrain)
Qal'at al-Bahrain – Ancient Harbour and Capital of Dilmun

Pearling, Testimony of an Island Economy

Dilmun Burial Mounds

বাংলাদেশ (Bangladesh)
Historic Mosque City of Bagerhat

Ruins of the Buddhist Vihara at Paharpur

The Sundarbans

Benin
Royal Palaces of Abomey

Bolivia
Fuerte de Samaipata

Borneo/Malaysia
Kinabalu National Park

Botswana
Okavango Delta

Brasil (Brazil)
Iguaçu National Park

Pantanal Conservation Area

Rio de Janeiro

Kâmpuchéa (Cambodia)
Angkor Temple Complex

Chile
Rapa Nui National Park

中国 (China)
Great Wall

Classical Gardens of Suzhou

Summer Palace

Temple of Heavens

Wolong Panda Reserve

Colombia (Columbia)
San Agustín Archaeological Park

Cuba
Old Havana and its Fortification System

Trinidad, together with the nearby Valle de los Ingenios

Urban Historic Centre of Cienfuegos

Κυπρος (Cyprus)
Painted Churches in the Troodos Region

Neolithic Settlement of Choirokoitia

Česká Republika (Czech Republic)
Historic Centre of Prague

Ecuador
Galápagos Islands

City of Quito

مصر (Egypt)
Memphis and its Necropolis

Ancient Thebes with its Necropolis

Nubian Monuments from Abu Simbel to Philae

ኢትዮጵያ (Ethiopia)
Simien Mountains National Park

Aksum

Omo Valley

Rock-hewn Churches of Lalibela

Fasil Ghebbi

Ghana
Forts and Castles, Volta, Greater Accra, Central and Western Regions

Guatemala
Tikal National Park

Honduras
Maya Site of Copan

Magyarország (Hungary)
Budapest

Hortobágy Puszta

Caves of Aggtelek

Lýðveldið Ísland (Iceland)
Þingvellier National Park

Vatnajökull National Park

भारत गणराज्य (India)
Red Fort in Delhi

Qutb Minar and its Monuments

Khajuraho Temle Complex

Red Fort in Agra

Taj Mahal

Fatehpur Sikri

Keoladeo National Park

Jantar Mantar

Jaipur City

Indonesia
Borobudur Temple Compounds

Komodo National Park

Prambanan Temple Compounds

Tropical Rainforest Heritage of Sumatra

Éire (Ireland)
Brú na Bóinne

Italia (Italy)
Historic Centre of Rome

Venice and its Lagoon

Piazza del Duomo, Pisa

Archaeological Areas of Pompei and Herculaneum

Costiera Amalfitana

Archaeological Area of Agrigento

Villa Romana del Casale

Paestum

Late Baroque Towns of the Val di Noto

Mount Etna

Cathedral Church of Cefalù

日本国 (Japan)
Historic Monuments of Ancient Kyoto

Ancient Nara

الأردنّ (Jordan)
Petra

Wadi Rum Protected Area

Kenya
Kenya Lake System in the Great Rift Valley

ເມືອງ ລາວ (Laos)
Old Town Center of Luang Prabang

Vat Phou

Plain of Jars

Lietuvos (Lithuania)
Vilnius Historical Center

Malawi
Lake Malawi

Mali
Old Town of Djenné

Tombouctou (Timbuktu)

Cliff of Bandiagara (Land of the Dogons)

Malta
City of Valletta

Megalithic Temples of Malta

México
Pre-Hispanic City and National Park of Palenque

Historic Centre of Mexico City and Xochimilco

Pre-Hispanic City of Teotihuacan

Archaeological Monuments Zone of Xochicalco

Монгол улс (Mongolia)
Orkhon Valley Cultural Landscape

المغرب (Morocco)
Medina of Fez

Medina of Marrakesh

Ksar of Aït-Ben Haddou

Historic City of Meknes

Archaeological Site of Volubilis

Rabat, Modern Capital and Historic City: a Shared Heritage

Myanmar
Bagan

Namibia
Namib Sand Sea

नेपाल (Nepal)
Kathmandu Valley

Chitwan National Park

Panamá
Panamá Viejo and Historic District of Panamá

Perú
Cusco

Machu Picchu

Polska (Poland)
Historic Centre of Warsaw

Auschwitz and Birkenau

Nature Reserve in Białowieża

Castle of the Teutonic Order in Malbork

قطر (Qatar)
Al Zubarah Archaeological Site

Россия (Russia)
Historic Centre of Saint Petersburg

Kremlin and Red Square in Moscow

Historic Monuments of Novgorod and Surroundings

Lake Baikal

Saint Lucia
Pitons Management Area

San Marino
San Marino Historic Centre and Mount Titano

Sénégal
Djoudj National Bird Sanctuary

Island of Saint-Louis

Singapore
Singapore Botanical Gardens

Slovensko (Slovakia)
Spišský Hrad

Bardejov Town Conservation Reserve

Wooden Churches of the Carpathian Mountains

South Africa
Fossil Hominid Sites of South Africa

Drakensberg Park

ශ්රී ලංකා/இலங்கை (Sri Lanka)
Ancient City of Polonnaruwa

Ancient City of Sigiriya

Sinharaja Rain Forest Reserve

Kandy

Galle

Cave Temple at Dambulla

Suriname
Historic Inner City of Paramaribo

Tanzania
Ngorongoro Conservation Area

Serengeti National Park

Kilimanjaro National Park

བོད་ (Tibet)
Potala Palace

Türkiye Cumhurieti (Turkey)
Historic areas of İstanbul

Göreme National Park and the Rock Sites of Cappadocia

Hattuşa

Mount Nemrut

Hierapolis and the Travertine Terraces of Pamukkale

Troy

Ephesus

Neolithic Site of Çatal Höyük

Pergamum

Aphrodisias

دولة الامارات العربية المتحدة (United Arab Emirates)
Cultural Sites of Al Ain

Uganda
Bwindi Impenetrable Forest

United Kingdom
Stonehenge

English Lake District

Jodrell Bank Observatory

Uruguay
Colonia Historic Quarter

USA
Grand Canyon National Park

Everglades National Park

Statue of Liberty

O'zbekiston (Uzbekistan)
Samarkand

Holy See (Vatican)
Vatican City

Zimbabwe/Zambia
Victoria Falls

Việt Nam
Complex of Huế Monuments

Ancient Town of Hội An

There are 160 UNESCO World Heritage Sites in this list
UNESCO World Heritage Sites on www.guenther-eichhorn.com