Kensington Palace

When this was first built, it was considered to be outside of London and a place where the king and queen could escape from the dust, dirt, noise, and all of the city. Surrounded by acres and acres of land, trees and gardens, there was no need for gates like this when it was first built.
This is where Charles and Diana lived. People still live there - cousins of the Queen or her children, if I remember correctly - "at the Queen's pleasure."
A good bit of the palace is open to the public and it truly is impressive to walk through it, realizing that people have lived it in for hundreds and hundreds of years.
What struck me most, however, was that in spite of all this wealth and opulence, not everyone who lived here lived well, or in good health, or particularly happy. One queen, the tour tape said, lived there until she died at age 49. At the end of her life she was, "blind, obese and totally dependent upon others." That saddened me.