London, the capital city of the United Kingdom, is one of the world's most vibrant and culturally rich cities. It's known for its rich history, iconic landmarks, diverse neighborhoods, and a wide range of cultural and entertainment offerings. London’s 2018 population was 8,961,989.

The Royal Observatory, Greenwich is the home of the Prime Meridian of the World. The Royal Observatory is London's only planetarium, Harrison's timekeepers and the UK's largest refracting telescope. The Royal Observatory is situated in beautiful Greenwich Park and is part of Royal Museums Greenwich.

Tate Modern is a modern art gallery located in London. It is Britain's national gallery of international modern art and forms part of the Tate group. It is housing the UK's collection of modern and contemporary art from 1900 to the present day and hosting special exhibitions and events.

The National Gallery is an art museum in Trafalgar Square in London. Founded in 1824, it houses a collection of over 2,300 paintings dating from the mid-13th century to 1900.