Hikers at Kokorin

I've made this picture for a wedding announcement for my friends. They are fond of hiking and their wedding took place at the Kokořín Castle (central Bohemia), so they wanted their wedding announcement to feature them, looking at Kokořín, and they asked me to draw it for them, which I gladly did.
(The final announcement also had some handwritten text in the upper part, but that's not important, so I did't include it here.)

I hope you like it. Have you ever heard of the Kokořín Castle, or have you been there? Czechs probably have, others most likely not. It's a rather small castle, but a lovely one, and set in a beautiful landscape of sandstone rocks, deep valleys, pine-tree forests and picturesque villages.