Czech it out....

The Houska Castle, Blatce in the Czech Republic is thought to be a portal to hell and for this reason, it is considered one of the scariest castles in all of Europe. 

The Gothic castle was built on top of a hill in the middle of the 13th century on the orders of Ottokar II, King of Bohemia. 

No one is sure why the castle was built or why it was built in the middle of nowhere.  There are no sources of water anywhere near the castle.  Folklore says no one has ever called the castle home. 

The castle was also oddly constructed over a hole that no one could see the bottom of, hence the nickname Gate to Hell. 

Legend has it that at night evil creatures venture out of the castle including a half demon/half animal creature with black wings that circles the area every evening. 

These villainous animal/human hybrids terrorize the locals and slaughter their livestock.  Some say these creatures can still be seen at nightfall (evil laughter).  If you are going to be in Prague, Houska Castle is only 29 miles north so swing by at night if you are not scared of these hellbeasts.