We may begin our trip by exploring Bobří soutěska (Beaver's Gorge). The best way to get there is to go to the village of Verneřice, where we make a turn and join a side road towards "Loučky" and continue along Bobří brook and around houses and cottages. The green tourist sign also follows this road. However, after it leaves the last house in the village it will turn right and joins a forest path. Here, we park our car and continue on foot following the green sign. After 200 metres we will reach the beginning of the gorge. You may walk on the narrowest part only if the water depth is at a normal level. The Bobří Brook with its waterfalls is a natural heritage monument that protects the steepest part of the canyon valley, created by the brook erosion effects on the basalt stones. There is a large water rapid resembling a waterfall on the main stream and 6 m high waterfall on the right feeding stream. The most attractive gorge is located within the first 200 m and it is lined with steep slopes and rocks. After that the ravine begins to open. But it is still worth going through the entire valley (about 2 km) until you reach the place where the green sign leaves the Beaver Brook river basin. To go back to the parking lot, we take the same road. In approximately the middle of our journey we will see a large sea of stones on the slope on the left river bank. From the Beaver Gorge we will go to the town of Úštěk, where we can park directly on the town square. Úštěk is an ancient town built on a sandstone cliff with an important historical core belonging to the town's historical heritage zone. The most impressive sight is the square lined with bourgeois houses with boxy arcades and Gothic passages which make us feel as if we have gone back in time. The well-preserved town fortification wall may be seen on the south side of the town. The originally Gothic castle was later used as a malt shop. When we finish our tour through the town, we will go down towards the town square and to the "Na růžku restaurant", where we turn right towards "Ostré". After driving uphill for about 2 km we will see a parking lot and tourist crossroad sign near the road. We shall park here and go to see the Hradecký Mine and Helfenburk Castle. The crossroad sign tells us that the length of the circuit is only 5.5 km long, but in reality it is about 6 km long. We will take the direction towards "Ptačí důl" (Bird Mine) (1 km). To get there we will take a steep downhill walk until we reach the bottom of the Bird Mine. From here we continue to follow the yellow direction towards "Helfenburk Castle" (1.5 km). A slow uphill climb at the bottom of the Hradecký Mine will turn after about 1 km into a sharp uphill climb, which will take us to a rocky cliff, where we will find the above-mentioned Hrádek (castle). This castle cannot be seen from this road until the last moment. Then you will be suddenly surprised by its sheer size and its good condition. It was built in the early 14th century and equipped with massive castle walls (12 metres high and 200 m long), still preserved today and with a 30 m high tower (now modified as a viewing tower). Also, many buildings built on sandstone rocks are well-preserved, including the underground area and 57 m deep well. The castle is freely accessible all year-round, but at your own risk only. Primarily, children should not wander freely around here without adult supervision. We shall now continue to follow the red sign on the Hradecký circuit towards the "Hradecký Mine" 1 km. To get to the Hradecký Mine crossroad sign, we will take a downhill walk from the castle cliff, where we will enjoy the beautiful views of distinctive sandstone mountains for the first time. Then we shall begin to climb up to the upper edge of the Hradecký Mine. After about 2 km we reach the edge of the Hradecký Mine. On our right hand side we will see a large field and meadows, and on our left side a steep and rocky slope. From the village of Ostrá it is only 500 m to the parking lot where we parked our car. Our last stop is the historical town of Litoměřice, where we can also park right in the centre of the town square. The town of Litoměřice is rich in historical monuments and has always been a centre of horticulture, viticulture and hop growing. Remnants of Gothic walls with towers and battlements are among the best preserved monuments in the Czech Republic. Especially on the square and around it, we will find a number of perfectly reconstructed Renaissance bourgeois houses with Gothic cores. The Town Hall and the Church of All Saints are unforgettable sights. A unique complex represents the former Jesuit Church of the Annunciation of the Virgin Mary and the former Jesuit College, which are connected through a hidden corridor located above a monumental staircase.