London

The best time to visit London is during the shoulder seasons, specifically April-May and September-October. The weather is generally pleasant, crowds are smaller than in the peak summer months, and you can often find better deals on flights and accommodations.

London boasts a wealth of attractions. Some of the must-sees include the Tower of London, Buckingham Palace, the British Museum, the Houses of Parliament and Big Ben, the London Eye, and Westminster Abbey. Consider also visiting the National Gallery and exploring the many Royal Parks.

Londoners are generally polite and appreciate good manners. It's customary to queue (line up) for everything, from buses to attractions. Tipping is expected in restaurants (around 12.5% is standard), and it's considered polite to say 'please' and 'thank you'.

London has an excellent public transportation system. The London Underground (the Tube) is the fastest way to get around, but buses and overground trains are also readily available. Consider purchasing an Oyster card or using contactless payment for easy travel. Walking is also a great way to explore the city, especially in central areas.

London offers a diverse culinary scene. Don't miss the opportunity to try traditional fish and chips, a full English breakfast, and afternoon tea. Explore the diverse food markets like Borough Market, and consider trying cuisines from around the world, as London is a global food hub.