- London is the capital city of England and the United Kingdom. - It is the most populous city in the United Kingdom, with a metropolitan area of over 13 million inhabitants. - London is a global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport.

There are many things that make London unique, but some of the most notable include its history, its culture, and its diversity. London is one of the oldest cities in the world, and its history can be seen in its architecture and in its many museums. London is also a cultural center, with a vast array of theaters, galleries, and other cultural attractions. And because London is such a diverse city, it offers a wealth of different cuisines and cultural experiences.

The most popular sights in London are: Buckingham Palace, the Tower of London, Westminster Abbey, St. Paul's Cathedral, and Trafalgar Square.

The best attraction in London is the Tower of London.

Bucharest is the capital of Romania and its largest city, with a population of over 2 million. It is a cultural, economic, and political center of the country. Bucharest is home to the Romanian Parliament, the National Museum of Art, and the National Opera.

What makes Bucharest unique is that it is the only city in Romania that is situated on the banks of the Dâmbovița River.

The most popular attractions in Bucharest are the Palace of Parliament, the Romanian Athenaeum, and the National Museum of Art.

The best attraction in Bucharest is the Palace of the Parliament.