1. The old cabin in the woods was the frowstiest place I had ever been in.
2. The basement of the abandoned house was the frowstiest part of the whole building.
3. After spending hours in the damp cave, I emerged feeling like the frowstiest person alive.
4. The frowstiest room in the house was the attic, with its musty smell and lack of ventilation.
5. The frowstiest corner of the library was where the old books were kept, covered in dust and cobwebs.
6. The frowstiest part of the dungeon was where the prisoners were kept, with no light or fresh air.
7. The frowstiest part of the haunted house was the cellar, where strange noises could be heard at night.
8. The frowstiest part of the forest was where the trees were so thick that the sunlight couldn't penetrate.
9. The frowstiest part of the hospital was the morgue, with its cold, sterile atmosphere.
10. The frowstiest part of the ship was the bilge, where the dampness and mold made it unbearable to stay for long.