The Naujene castle hill is on the steep bank of the Daugava River, is up to 25 metres high and has two valleys on its sides.  Between 1275 and 1277, the master of the Livonian Order, Ernst von Ratzenburg, organised the construction of a brick castle to replace a Lettigalian wooden castle that had stood there before.  The castle had a drawbridge and an external and internal forecastle.  Until the middle part of the 16th century, the castle was the residence of one of the top officials in Dünaburg.  The forces of Ivan the Terrible sacked the castle in 1577, after which the location lost its strategic importance.  New fortifications were built in the location that is now the city of Daugavpils.  Alongside the ruins of the castle is a miniature model that helps to imagine the appearance of the location many centuries ago.  A well-appointed pathway leads from the car park to the castle hill.  The hill offers one of the loveliest views of the curvy Daugava River and its surrounding nature park.

Atrodas Skuķu ezera ziemeļaustrumu krastā. No torņa labi saskatāms aizaugušais Skuķu ezers ar nelielām ūdens lāmām un ūdeņiem bagātos pavasaros pārplūstošā Dvietes paliene. Laba putnu vērošanas vieta.

One of the highest dunes in Latvia, located between Bernāti and Jūrmalciems villages. It is 37m high and offers a magnificent view of the sea and natural pine forests. The highest dunes in Latvia stand to the South of Jūrmalciems village: the Pūsēnu hill, the Ķupu hill, the Mietragkalns or Tiesas hill, the Pāļu hill, the Garais hill, the Ātrais hill, the Lāvas hill. The Pūsēnu dune is the highest of these dunes which are all called hills by the local people. The Pūsēnu hill developed between 1785 to 1835 when shifting sand became extremely dangerous. Several homesteads were buried in sand, among them „Pūsēni”, where a forester’s family lived. The family is said to have moved to Bārta. The dune was named after the buried homestead.

Jēkabs Janševskis, a Latvian writer, wrote in his book „Nīca”: “In olden times, large pine trees were growing in the dunes on the coast of Nīca and they stood steady and firm. But i Swedish times (around 1650), the Swedes built a large kiln for charcoal and tar. Pine wood and stumps provided an excellent material for this. Once a big fire rose, and the charcoal kiln burned down as well as the whole pine forest. The remaining stumps and bare trunks in the vast burnout could not hold the storm-driven sand; it flew further and further burying not only the burned-out forest, but also the nearest fields. In wintertime, when the vast, low marshy grasslands were covered with ice, jets of sand drifted further over its surface, and soon most of the grasslands and large meadows turned into sandy heath-land and dunes.”

To reconstruct Liepāja, severely damaged during WWII, a silicate brick factory was built in the town. The main raw material was white sand and it was taken from the Bernātu forest. In the 1960-ies they started to dig off the Green Dune and the White Dune, later also the Pūsēnu hill. The excavators used to work day and night, in three shifts. The work stopped at around 1980, as there was no more sand suitable for production of brick.

A trail is set up to facilitate walking in the Pūsēnu Dune in the Bernātu Nature Park.

10 km garais pārgājienu maršruts iepazīstina ar vienu no vēl retajiem, cilvēka mazāk ietekmētajiem Daugavas senlejas posmiem. Tā sākums – Aizkraukle, finišs – Skrīveri. Gar upes krastu izvietotas atpūtas vietas. Maršrutu var braukt arī ar velosipēdu.

The trail climbs up and down along the bluffs of lower River Pilsupe and reveals a fascinating sight of three white dune exposures (the largest is called the White Dune). The trail is 900m long, and the White Dune is ca 20m high. It has formed ca 6000 years ago, in the period of the Littorina Sea which is a foregoer of the Baltic Sea. Here the first Stone Age settlement on the North Western coast of Latvia has been found in 1934 by geologist S. Burhards. In the sand, some 500m from the sea, he found some pottery fragments, a sandstone hone, a piece of flint, parts of bones and an amber bead. He handed the findings over to the National Museum of History. In October 1934, the site was checked by archaeologist E. Šturms, who found the archaeological layer, typical for such settlements, in the landslides of the Pilsupe riverbanks. In 1936 he started larger excavations to continue by 1938. Totally seven, chronologically different settlements were detected and many artefacts found, including fragments of the so called Sārnate and pit-comb pottery, as well as some pieces of corded pottery. Based on these findings, the settlement is dated back to the beginning or middle of the 3rd millenary B.C., and it has been inhabited till the beginning of the 2nd millenary B.C. Especially remarkable are three clay figures in human shape which have probably been used for some religious cult purposes.

Since 1993, archaeologist Ilzes Loze has discovered several pit-comb ware culture settlements in large area around Pūrciems village. They are known in research literature as „the Ģipka settlements”.

The Mežotne castle hill is on the left bank of the Lielupe River and opposite the Mežotne Castle. This was one of the largest Semigalian fortified castle hills during the 9^th to the 13^th century, and an ancient town alongside the hill covered 13 ha of land. The castle hill has been improved. A pontoon bridge across the Lielupe allows hikers and bikers to reach the castle (between May and October). Vīna Hill is approximately 500 m to the South of the castle hill, and a wooden pathway leads to it.