City Museum of Ljubljana
Situated in the grand Auersperg Palace, this museum's beautifully designed exhibits trace the city's history from pre-Roman times through the Austrian domination, the World Wars, the Tito years, and finally, the establishment of independent Slovenia. In the basement, you can walk on a piece of the ancient Roman road or see a cross-sectioned excavation that shows the burning of Emona by Attila the Hun through a black charred stratum. If you're interested, you can arrange for a museum guide to take you to other ancient Roman sites around the city. The city museum also houses the world's oldest wooden wheel, dating from 4000 BC.