Tower of London: A historic castle with a long and bloody history, now a UNESCO World Heritage Site.
Tower of London | Historic Royal Palaces (hrp.org.uk)
Buckingham Palace: The official residence of the British monarch, offering tours and the changing of the guard ceremony.
Westminster Abbey: A historic abbey where monarchs are crowned and buried, a UNESCO World Heritage Site.
A royal church | Westminster Abbey (westminster-abbey.org)
Houses of Parliament: The home of the British Parliament, offering tours and views of Big Ben.
St. Paul's Cathedral: A magnificent cathedral designed by Christopher Wren, offering tours and views of the city.