Depart from your Ljubljana hotel at 8:30am for your 11-hour small-group tour with a guide. Journey for 45 minutes to Lake Bled and make your way to Bled Castle, which is perched on top of a steep cliff. Snap a few pictures from this lookout point. At your own expense, ride in a traditional covered boat to Bled Island and climb the steep stairs to reach a 15th-century church.
Continue on to Postojna Cave and spend 1.5 hours walking through the karst formations and stalactites.
Go on to Predjama Castle, where you can explore the rooms and corridors and take pictures of the building. At the end of the day, your group will head back to Ljubljana.