Palace of Westminster
Houses of Parliament along the Thames, which also Big Ben is a part of, is one of the most well-known destinations in London. The original palace was built in the 11th century, and the current one was completed in 1876.
The building is familiar from movies, postcards and posters. If you want to get a better overall view of the whole building, it is better to go to the other side of the river, where you can see the more familiar side. You can also get pictures from the Westminster Bridge next to Big Ben, although Big Ben itself is currently under renovation.
The virtual tour of the Houses of Parliament covers 14 sections/areas of the building. The tour includes places such as House of Commons and Lords Chambers as seen on heated TV debates.