The Houses of Parliament in London, also known as the Palace of Westminster, is where the UK Parliament meets. It's a fancy Gothic-style building on the River Thames that houses the House of Commons and the House of Lords. The place has a long history, with the current building designed by Sir Charles Barry and A.W.N. Pugin in the 19th century. It's got some cool features like Big Ben and was even designated a UNESCO World Heritage site in 1987. So, basically, it's a pretty important and impressive spot in British politics and architecture. The best way to see the beauty of the House of Parliament is from the river, so perhaps consider a river cruise.