Panorama of theTower of London, UNESCO World Heritage Site, London, England, United Kingdom, Europe

historical architecture london england united kingdom europe ancient walls tourists historical landmark castle panoramic view sightseeing cultural heritage outdoor exploration travel history stone structure skyline royal palace military fortress british history green space visitors guided tours attraction locals architecture cityscape heritage site medieval castle events grassy area sightseeing tours urban landscape famous landmarks iconic sites panoramic landscape tourism cultural site travel destination famous buildings ancient history visitor experience exploration walking tour public park historical significance britain view green field scenic spot