12. Tower Bridge
This Victorian structure inaugurated in 1894 features walkways that run 140 ft above the River Thames. These walkways were constructed to make crossing the Thames a less time taking job. The Bridge, on the other hand, was raised for allowing tall ships to move through without any obstruction. When walking through the glass sided alleys of the Tower Bridge, you will witness some of the most breathtaking views the city of London will ever offer you.