1. Buckingham Palace is a royal residence in London

    Buckingham Palace is a royal residence in London

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  2. Alcatraz Island is an island offshore from San Francisco, California, United States

    Alcatraz Island is an island offshore from San Francisco, California, United States

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  3. Hohensalzburg Fortress is a medieval fortress in the city of Salzburg, Austria.

    Hohensalzburg Fortress is a medieval fortress in the city of Salzburg, Austria.

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  4. The Sydney Opera House in Sydney, New South Wales, Australia

    The Sydney Opera House in Sydney, New South Wales, Australia

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  5. The Sistine Chapel is the pope's official residence in Vatican City

    The Sistine Chapel is the pope's official residence in Vatican City

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  6. Craigmillar Castle is a ruined medieval castle in Edinburgh, Scotland

    Craigmillar Castle is a ruined medieval castle in Edinburgh, Scotland

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  7. The Trump Hotel Las Vegas is a hotel and Condo in Nevada, US

    The Trump Hotel Las Vegas is a hotel and Condo in Nevada, US

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  8. Broughty Castle is a historic castle in Broughty Ferry, Dundee, Scotland

    Broughty Castle is a historic castle in Broughty Ferry, Dundee, Scotland

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  9. The Château de Chambord in Chambord, Centre-Val de Loire, France,

    The Château de Chambord in Chambord, Centre-Val de Loire, France,

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  10. The London Eye or the Millennium Wheel in London

    The London Eye or the Millennium Wheel in London

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  11. Grand Lisboa hotel in Sé, Macau

    Grand Lisboa hotel in Sé, Macau

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  12. Southsea Castle also known as Chaderton on Portsea Island in Hampshire, UK

    Southsea Castle also known as Chaderton on Portsea Island in Hampshire, UK

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  13. The Gherkin is a commercial skyscraper in London

    The Gherkin is a commercial skyscraper in London

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  14. The O2 Arena is a multi-purpose indoor arena in southeast London.

    The O2 Arena is a multi-purpose indoor arena in southeast London.

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  15. The United States Air Force Academy Cadet Chapel north of Colorado Springs

    The United States Air Force Academy Cadet Chapel north of Colorado Springs

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  16. Lumley Castle is a 14th-century quadrangular castle at Chester le Street in England

    Lumley Castle is a 14th-century quadrangular castle at Chester le Street in England

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  17. The Castle, Newcastle, or Newcastle Castle in United Kingdom

    The Castle, Newcastle, or Newcastle Castle in United Kingdom

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  18. Seminole Hard Rock Hotel & Casino Hollywood The Guitar Hotel in Florida, United States

    Seminole Hard Rock Hotel & Casino Hollywood The Guitar Hotel in Florida, United States

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  19. The Colosseum founded 1944 years ago in Rome, Italy

    The Colosseum founded 1944 years ago in Rome, Italy

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  20. Rochester Castle in Rochester, Kent, South East England

    Rochester Castle in Rochester, Kent, South East England

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  21. Nottingham Castle in Nottingham, England

    Nottingham Castle in Nottingham, England

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  22. The Palace of Versailles (château de Versailles) in Versailles, France

    The Palace of Versailles (château de Versailles) in Versailles, France

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  24. Portland Castle is an artillery fort in United Kingdom

    Portland Castle is an artillery fort in United Kingdom

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  25. Quantum Panel: Ufology in Public

    Quantum Panel: Ufology in Public

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