Konopiste: Benesov, Czech Republic. From Prague, Franz Ferdinand’s castle is a short day trip of about 30 miles by car or train. A guided tour in English is $13.50 per person (011-420-317-721-366; zamek-konopiste.cz; czechtourism.com/c/konopiste-chateau).
Kaiservilla: Bad Ischl, Austria. The summer residence of Emperor Franz Joseph and his wife, Sisi, is about 32 miles from Salzburg. An $18 fee includes access to the surrounding park (011-43-613-223-241; www.kaiservilla.at/index.php/en).
Achilleion: Corfu, Greece. Empress Sisi created her own private retreat on the Ionian island of Corfu, designed in the manner of an ancient Greek palace. Admission: about $9 (011-302-661-056-245; www.achillion-corfu.gr/default_en.html).
Miramare: Trieste, Italy. Perched on an Adriatic promontory, this castle was designed to the sea-loving specifications of Franz Joseph’s younger brother, Maximilian, who became briefly (and tragically) emperor of Mexico. Fee: $12.50 (011-39-040-224-143; castello-miramare.it).
Information: czechtourism.com; austria.info/us.