You can make a trip to Andělská Hora, which is an important pilgrimage site near Karlovy Vary. Pilgrims used to come here to a well that healed sick pilgrims. Although the well is no longer here, a memorial lime tree was planted in its honour.
The main attraction of the place is the ruins of the castle and the pilgrimage church of the Holy Trinity, which was built in 1712. The church surprises its visitors especially with its triangular layout. In contrast, the history of the castle dates back to the 14th century. It was at its greatest glory during the Hussite Wars, when the warrior Jakoubek of Vřešovice launched military raids from it. The castle then lasted until the Thirty Years’ War, when it was burnt down by the Swedes. After it was rebuilt, it lasted until the first half of the 18th century, when it and its surroundings burned down.
Although the castle is now just a ruin, the views from the castle are definitely worth it. In good visibility, you can see the Doupovské hory for example.