London buzzes where medieval towers watch over modern skyscrapers. Cross the glass walkway of Tower Bridge for free, then explore South Bank's street performers and global food stalls. Budget travelers thrive with free museums like the British Museum and Tate Modern, hop onto red double-decker buses with a day pass, and find cheap eats at Camden Market's lively stalls. Pubs serve classic fish and chips for under ten pounds, all under skies that shift from misty morning to golden evening.