Centralia, Pennsylvania

In 1962, a mysterious fire ignited from an unknown cause within the underground coal deposits of the town. As long as burning coal is exposed to oxygen, it can continue to blaze for hundreds of years. That is why even today, Centralia, Pennsylvania, is still burning from the inside, ripping the ground to shreds.
Pripyat, Ukraine

This Ukrainian town is located near the 1986 Chernobyl disaster site. Soaked through with harmful nuclear radiation, Chernobyl was cut off from the rest of the world and left to rot for decades. The nearby town of Pripyat was similarly affected, and all residents had to be evacuated. Some street artists and explorers now explore the area since the radiation level has dropped, but prolonged stays are still dangerous to your health.
Oradour-sur-Glane, France

The remnants of this French village (barely) stand today as a reminder of the evil acts committed by members of the Nazi SS during World War II. On June 10, 1944, the Germans killed virtually everyone in sight. More than 600 men were gunned down, and the women and children were burned alive inside a local church. Only ashy rubble and fragments of structures remain, but the town is purposefully left alone by the French government as a testimony to the atrocity.
Check out these abandoned amusement parks that will give you the creeps.