Glehn castle, constructed on Nõmme hill in 1886, looks just like a small fortress. The venue itself is a popular location for arranging events like seminars, conferences and weddings and is closed for the general public. The adjacent park, however, is a really nice place for a walk. Since it’s located pretty far away from the city center and the logistics are complicated, tourists rarely get to this area.
Nevertheless, if for any reason you end up nearby, it is well-worth a visit. Not only can you can find some interesting sculptures here, including the approximately 10-meters-high statue of Kalevipoeg, but also an old Tallinn observatory tower (Tallinna Tähetorn), well-hidden in the woods. I highly suggest finding it on a map and trying to locate it by yourself. Although it’s usually closed for visitors (except for special events), the exterior is pretty cool by itself.
In the summer months Glehn Castle Park is a perfect place for jogging or just for a small walk. In winter it’s probably the best location around for skiing, of course only in case you will be lucky enough to catch some snow.