One of the coolest adventures could be in South America. There could be an ancient magical ruin that holds a powerful magic artifact. Harry would have to solve a series of puzzles and overcome various magical traps to get to it. Along the way, he teams up with local wizards and they share their knowledge of the area's magic, which helps him in his quest.
In this fanfiction, Harry might visit magical places in different countries. For example, he could go to Japan and discover a hidden magical forest filled with unique magical creatures that are not found anywhere else. Maybe he'll also encounter a new type of magic that is only practiced in that part of the world.
Well, he could travel to Africa and meet a tribe of witches and wizards who have a completely different way of using magic compared to what he's used to in Hogwarts. They might use magic for things like communicating with the spirits of the land or for healing in ways that are very different from the potions and spells he knows. It would be really exciting to see how he adapts to their ways.
In such fanfictions, one interesting scenario could be Harry Potter visiting the Great Wall of China. He might use his magic to explore the hidden parts of the wall that are not accessible to Muggles. Another could be his visit to the Amazon rainforest, where he discovers magical creatures unique to that area and has to use his skills to protect them from dark wizards who want to exploit their magic.
Well, in this fanfiction, Percy might encounter different mythical creatures in various parts of the world. For example, he could meet a yeti in the Himalayas. Or perhaps he stumbles upon a mermaid colony while sailing in the South Pacific. There could also be some ancient magic hidden in the ruins of Machu Picchu that he has to deal with.
Harry Potter might visit ancient magical sites around the world. In Egypt, he could explore the pyramids which are filled with ancient spells and hidden chambers. He may also learn about different forms of magic practiced by local wizards in various countries.
Well, in some 'harry travels the world fanfiction', he might encounter magical creatures in different parts of the world. For example, he could meet a yeti in the Himalayas and have to use his magic to communicate and find a way to coexist peacefully.
Well, in some of the adventures, Percy might encounter strange alien species. For example, he could meet a race of telepathic beings who communicate through colors. He has to learn their unique language to get help on his journey through the universe.
He might meet other young wizards from different magical schools. For instance, a French wizard who is very skilled in transfiguration and has a different approach to the subject than Harry does. They could exchange ideas and learn from each other.
One interesting adventure could be traveling to the Forbidden Forest in a different era. Maybe the protagonist gets to see how the forest was before Hogwarts was built. Another could be a journey to the wizarding schools in other countries that are only briefly mentioned in the original books, like Beauxbatons. And then there's the idea of traveling through time to witness the great battles of the wizarding world up close.
In this fanfiction, Percy might have adventures like battling mythical creatures in the Amazon rainforest. He could encounter new demigods and form alliances to face powerful foes.
Maybe Neville. He has grown a lot in his magical abilities and his courage. He could bring his knowledge of herbology, which might be useful in different parts of the world. Luna Lovegood could also be a great companion. Her unique perspective on magic would help Harry see things in a different light during his travels.
In this fanfiction, Percy might encounter alien species with unique powers. For example, he could meet a race that can control time, which would lead to some really exciting adventures as he tries to navigate through their time - warped worlds while also dealing with his own demigod powers.