Hollow Earth Expedition: The Frozen City of Terror takes a group of investigators from a simple rescue into the bowels of a creepy experience. The straight forward adventure is perfect for a one shot. In the adventure, the PCs are investigating a missing research team in the frigid unknown of Antarctica.
One of the most important things that a writer can do when trying to write an adventure in a modern setting with supernatural elements embedded in is to perform enough research so that the setting feels authentic. If the PCs do not feel that the setting is real, you can ruin the creepy, terror atmosphere you are trying to create. The writers succeed admirably at this task, reinventing a better setting and plot than the flop of a movie Whiteout.
This adventure may not fit in an ongoing campaign, as it restricts archetypes and stays fairly straight forward. However, as a one shot, the isolation of the setting brings a feeling of anything can happen, which is what you want when running a one shot.
In the end, players will enjoy the several twists in the story and the strong prose writing.