A photograph of United Kingdom

Country guide

United Kingdom

The United Kingdom is 244,376 km² holding 69,281,437 people, and it is four countries rather than one: England, Scotland, Wales and Northern Ireland, with Londo...

Photograph · Colin · CC BY-SA 4.0

27,736 Places
4Cities

Reviewed by Elena Voss · Roavina Travel Editor

The United Kingdom is 244,376 km² holding 69,281,437 people, and it is four countries rather than one: England, Scotland, Wales and Northern Ireland, with London, Edinburgh, Cardiff and Belfast as their capitals. Three of the four run parliaments of their own over devolved matters, and the law splits three ways — England and Wales, Scotland, Northern Ireland. A visitor meets that in small practical things rather than at a border. London alone holds about 9.1 million of the total, which is why so many trips never leave it, and why the ones that do feel like arriving somewhere else.

Checked 2026-08-25

Cities

Every city catalogued in this country so far, ranked by how much there is to see.

Practical information

Language spoken
English; Welsh is official in Wales
National practical orientation; regional and minority languages may also be used
Dialling code
+44
International calling code; local area and mobile prefixes still apply
Currency
Pound sterling (GBP)
Use the official local currency; card acceptance varies by place
Emergency number
999 or 112
Use only for an emergency; tourist assistance may use a separate number
Plug type
Type G · 230 V
Check that chargers support the recorded voltage before using an adapter
Tap water
Safe from the mains
Public water suppliers regulate mains drinking water; use cold mains taps

Top things to see

Ranked by importance — sitelinks, pageviews and heritage status, not editor preference.

  1. Buckingham Palace Buckingham Palace
    02 1 hr 30 min

    Buckingham Palace

    Buckingham Palace is the London residence and the administrative headquarters of the British monarch, standing at the western end of The Mall in the City of Westminster.

    • Must see
    • Historic monument
    • London
  2. Westminster Abbey Westminster Abbey
    03 2 hours

    Westminster Abbey

    Westminster Abbey brings together royal ceremony, memorials and daily worship in a church whose architecture developed over centuries. Coronations have taken place here since 1066.

    • Must see
    • Historic monument
    • London
  3. Tower Bridge Tower Bridge
    04 1 hr 15 min

    Tower Bridge

    Tower Bridge combines a working Thames crossing with a visitor attraction inside its towers and former engine rooms. Crossing on the public pavement does not require an attraction ticket; going upstairs to the Walkways does.

    • Must see
    • Historic monument
    • London
  4. British Library British Library
    05 1 hr 30 min

    British Library

    The British Library is the national library of the United Kingdom and, by collection size, one of the largest libraries in the world: more than 200 million items, including roughly 13.95 million books, 351,116 manuscripts, 8.27 million philatelic items and…

    • Must see
    • Historic monument
    • London
  5. St Paul's Cathedral St Paul's Cathedral
    06 2 hours

    St Paul's Cathedral

    St Paul's Cathedral is the cathedral church of the Diocese of London and the great domed building on Ludgate Hill, designed by Sir Christopher Wren and built between 1675 and 1710 after the medieval cathedral on the site burned in…

    • Must see
    • Historic monument
    • London

Source: OpenStreetMap contributors, Wikidata ·

Common questions

How long should a first trip to United Kingdom be?

Ten to fourteen days can cover four or five days in London, two in Manchester, and two or three each in Edinburgh and Glasgow. The Highlands, Lake District, or Welsh national parks need dedicated nights and should not be squeezed into London day trips.

What entry documents are needed for United Kingdom?

UK document rules depend on nationality and trip purpose, and many visitors now need an Electronic Travel Authorisation before boarding. Check the linked UK government visa service for both visa and ETA status shortly before travel.

What is the best way to travel around United Kingdom?

Intercity rail is the practical spine between London, Manchester, Edinburgh, and Glasgow, with advance fares usually distinct from flexible tickets. Each city runs its own local fare system, so London's contactless cap is not a nationwide travel pass.

When is a practical time to visit United Kingdom?

May to June and September are useful planning windows for this route, but conditions vary between southern England and Scotland. Festival dates in Edinburgh and rural transport in national parks can matter more than the national seasonal label.

What money and payment basics apply in United Kingdom?

The United Kingdom uses pound sterling (GBP). Contactless payment is widespread in major cities, but keep another payment method for rural services or terminals that do not share London's payment arrangements.

What practical safety details should I save for United Kingdom?

Use 999 or 112 for emergencies in the United Kingdom. Type G sockets supply 230 V, and mains tap water is recorded as safe; save rail disruption information as well when the itinerary depends on several city-to-city journeys.