Hoia Baciu forest, sometimes also called "Transylvanian Bermuda Triangle", lies in the heart of Romania and is for sure one of the most famous and terrifying places in Romania. Many people who visited the forest experienced nausea, disorientation and other physical ailments.

Within the forest there is a circle where no plant life will grow in. This circle was studied by many scientists but none of the studies was able to explain the existence of this circle as soil tests seem to match the soil surrounding the circle. This circle is also considered to be the center of paranormal activities within the forest, such as appearances of UFOs, strange lights, bright geometric shapes, materialization and dematerialization, twisting trees in intervals of tens of seconds and others.

In 1986 people who stayed in the forest overnight took a photo of UFO which is considered to be the clearest UFO photographed in Romania and one of the best one UFO photographed ever in the world.