The Underground
UN-der-grownd /ˈʌndəɡraʊnd/
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What it really means
London's metro system, officially "London Underground", almost always called "the Tube". Its logo is a red circle with a blue bar. Note that some Underground lines actually run above ground outside the centre.
Chinese explanation
伦敦地铁，官方名称"London Underground"，日常几乎都叫"the Tube"。标志是红圈蓝杠。注意有些地铁线在市中心以外其实是在地面上跑的。
Example conversation
A: What is the quickest way to Camden?
B: Take the Underground, the Northern line goes straight there.
A：去卡姆登最快怎么走？
B：坐地铁，北线直达。
Official sources
Rules and amounts change — confirm important details with the official source.
All Transport
Reviewed by the UK Decoded editorial team
· Last checked 24 July 2026 · Report a mistake