Realizing the city had the potential to be a trade hub, the Romans built the city's first bridge over a low point in the waterway: the first London Bridge. Opened in 1921, Southwark replaced an older bridge designed by John Rennie -- the man behind the Victorian London Bridge and Waterloo Bridge -- known as Queen Street bridge. Top options include Experimental Cocktail Club in Chinatown, The Little Yellow Door in Notting Hill, Evans and Peel Detective Agency in Earl’s Court and The Mayor of Scaredy Cat Town in Spitalfields. Travel to the Viewpoint at the south end of the Thames (across from Big Ben). The case has never been solved. Further downstream from Westminster you'll spot Lambeth Bridge. It doesn’t get much more traditional London than a plate of pie, mash and the classic green liquor; maybe with a side of the cockney favourite, jellied eels. It's this medieval bridge that's the likely inspiration for the nursery rhyme. As for the design, its Gothic details complement the Palace of Westminster, and it's painted green to match the leather seats in the House of Commons. If you're disappointed to learn London Bridge is a concrete structure from the 1960s -- a visit to the Victorian Gothic splendor of, "Tower Bridge was supposed to be a ceremonial gateway to London," says Wynne Rees. Then later in the year, peek inside some of the most iconic buildings and architecturally unique spaces around the city for free during Open House London.

The original Blackfriars Bridge opened in 1769, the third crossing to breach the River Thames. Rumors now abound that the Americans knew what was up -- and it was all a ruse to attract tourists to Arizona. The archaeologists are not entirely sure what these are — especially the bright green stone on the left. Waterloo Bridge was built by women as the men were at war. The bridge is adorned with seven coats of arms, including the coat of arms of the cities of London, Kent, Guildford, Colchester and the original coats of arms for the City of Westminster and Middlesex. Whatever the truth, the 19th century London Bridge is now a long way from home. These red pillars, between Blackfriars Bridge and Blackfriars Railway Bridge, formed part of the original 1864 railway bridge. Ask most Londoners and even they won't know the story behind this fruity adornment to Lambeth Bridge.

When you see chalk beds like this, above, it's because they've been artificially laid down to provide a soft bed for barges at low tide. 1. Tower Bridge lifts to let boats pass through. Waterloo Bridge is named after the battle of Waterloo, which took place in 1815. "They took the word 'Vauxhall' to mean 'station' and went back to Russia and, to this day, main railway stations in Russia are denoted as 'vokzal,'" says Wynne Rees.