Resembling an anonymous and forbidding fortress, with turrets for armed guards, this house is where Leon Trotsky lived and was murdered. It's difficult to believe that it's the final resting place for the ashes of one of the most important figures of the Russian Revolution, but that only adds to the allure of this austere dwelling, which is owned by Trotsky's grandson. Anyone taller than 5 feet must stoop to pass through doorways to Trotsky's bedroom—with bullet holes still in the walls from the first assassination attempt, in which the muralist Siqueiros was implicated—his wife's study, the dining room, and the study where assassin Ramón Mercader (a man of many aliases) allegedly drove a pickax into Trotsky's head. On his desk, cluttered with writing paraphernalia and an article he was revising in Russian, the calendar is open to that fateful day, August 20, 1940. All informative materials are in Spanish only; English-language guides are available for groups of five or more but must be arranged a few days in advance.