Well, well, well, aren't we feeling adventurous today, looking to escape the well-trodden tourist path in Heidelberg? Fear not, dear traveler, for Detective Pux has scoured the city's nooks and crannies to bring you some of the most off-the-beaten-path tourist attractions in Heidelberg, Germany.

First up, we have the Philosophers' Walk. Now, I know what you're thinking, "Oh great, another boring walk filled with philosophers musing on the meaning of life." But this is Heidelberg, where things are a little different. This walk takes you through the beautiful Philosophers' Garden, where the city's great thinkers used to go for a wander and ponder. It's a peaceful, serene place, where you can escape the bustle of the city and think deep thoughts, or just enjoy the scenery.

Next, we have the Russian Orthodox Chapel. This little gem of a church is tucked away in the backstreets of Heidelberg and is often overlooked by tourists. But for those in the know, it's a real treat. The interior is covered in glittering icons and there's a feeling of peace and calm that you don't often find in the city's more crowded tourist spots.

And last, but certainly not least, we have the Heidelberg Tun. This massive wine barrel is housed in the city's cellars and is said to be one of the largest in the world. It's a must-see for any wine lover, as it's filled with enough wine to keep the city's residents drunk for years to come. The cellars themselves are a marvel of engineering, and the Tun is a real testament to the city's wine-making heritage.

So there you have it, folks. Three off-the-beaten-path tourist attractions in Heidelberg that are sure to make your trip a little more interesting. So don't be a tourist, be a traveler, and check them out for yourself!