Library of Alexandria
First, I'll start up with a real life place, the Library of Alexandria. This magnificent place once apparently had a volume of every book ever written at the time. It would be amazing to walk through the corridors lined with scrolls and books and uncover all of the great secrets locked within. Places like this are usually needed to advanced the plot in gamebooks, usually as a means for fining how to kill the big villain. For example, Codex Mortis may come in handy in Night of the Necromancer and joining the Wizards' College in Fabled Lands allows you to gain a lot of knowledge about your travels. However, as the mechanics of this card suggest, you need to have a certain level of knowledge to make use of the knowledge stored here. An illiterate barbarian would get nothing from this place.
Bazaar of Baghdad
A good adventurer always needs to prepare and this is generally where they find the food and equipment they need for their travels. Of course, you will need some money to get started and in terms of value, you generally end up on the losing end. After all, merchants need to make a profit to survive. However, you can't cross a desert and break into a treasure laden tomb with silver coins. The important thing is what you do with the items you have obtained.
When you have obtained your new equipment, you could do worse than to break into this vault and loot it. In this story, the cabal rule a city and raise hordes of treasure by hosting arena battles. This money has all been raised through corruption and bloodshed.
The ground is full of treasures. If you return from a quest with some gems or precious metals, then you may start a huge rush as miners and opportunists seek to share in your success. This may lead to the expansion of civilisation.
There are also treasures in the far flung corners of the world. If you discover a ruin, there is no knowing what lost treasures you might uncover. It could be art beyond price or a powerful magical item, its means of construction having been lost in time. Of course, that might be a bad thing...
The ground is not the only place that hides treasures. The sea is home to many cities, sunken ships and caves which could hide treasure beyond measure. Of course, you need to find a way to explore the depths without drowning.
Some great treasures are not physical. Exploration and discovery is a good enough reason for some to face the unknown dangers of the world on a quest and it may lead to a place beyond your wildest dreams.
Mouth of Ronom
Beautiful landscapes do not have to be tropical paradises teeming with life. There is also much beauty to be found in the snow capped mountains and the tundra as you can see in Tower of Destruction and The Caverns of Kalte. Of course, these inhospitable places are full of dangers. Beyond the obvious dangers of cold, avalanches and snow blindness, there are many snow monsters. It would be wise not to anger the local population either as they will probably be pretty tough to survive out there.
One reason to explore inhospitable areas is that you may find the remains of great civilisations and unearth their treasures and knowledge. I would love to see such an ancient temple. As an adventurer, you may also end up in such a temple to stop some evil cult from raising a powerful creature.
Finally, there may be great wonders to be seen in the centre of a world rather than just on the surface. Descending into a simple cave may lead to a place full of magic and strange creatures.
As well as the basic lands, these are the places that I would like to visit the most. Adventure takes you to many strange and beautiful places and these ten are only the start of the adventure.