In Raiding, a small nearby village 55km south of Eisenstadt, the Franz-Liszt-Geburtshaus contains many mementos of the composer's life, including an old church organ he used to play.
To get to the museum (tel. 02619/51057), take Route S31 south of Eisenstadt; then cut east onto a minor unmarked road at Lackenbach (follow the signs to Raiding from there). It's open only from Easter to October (daily 9am-noon and 1-5pm). Admission is 3.50€ ($5.60) for adults and 2€ ($3.20) for seniors, children, and students; a family ticket sells for 7€ ($11).
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.