Visiting London doesn't necessarily means visiting the royal palace of Buckingham or gawking at the Big Ben and the parliament along the Thames. The historically captivating lies not only above ground, but also dwells underground. Meet the London Underground.
 |
| FDCs with London Underground stamp set (above) and miniature sheet (below). The former features the historical milestone and landmarks of London Underground, while the latter showcases the posters used to publicized the use of the railway. |
