Astra Jigsaw Landmarks Edition offers lots of images of the most well-known and attractive landmarks from all around the world. The images include landscapes, buildings, monuments and lots of other things. The trial only includes a few images, but there are tons in the registered version. Besides, you can download more from the internet. The puzzles are completely customizable, since you can select the number of pieces (which can vary from 4 to 999), pieces shape (all kinds of irregular shapes), image frame, and mixing type. You can also add piece rotation to make the game even more challenging.
If you need help, you can use an image thumbnail for guidance, but that's the only help you can get, since there are no hints or anything. The puzzles are not timed, so you can take your time to solve them, and you can save them to continue them later. The screen is divided into two sides, so you can compare what you have and what it really is. There are also four pockets where you can also put pieces to organize the assembly in parts. The game offers simple graphics and sounds, and no music.
In short, if you like puzzles and you are looking for an application which includes lovely landscapes to enjoy, Astra Jigsaw Landmarks Edition may be good choice.