Lunca de Sus is situated 30 km far from Miercurea-Ciuc. It became independent as a commune about 1908. This is the first settlement of the Ghimes Csángós' along the road from the direction of Miercurea-Ciuc. This settlement-string spreads lengthwise from the Trotus riverhead as far as Valea Boros and consists of several valley and alpine scattered settlements. Lunca de Sus was formed mainly on the former areas of Nicolesti and Frumoasa. In 1782, it was still affiliated to Nicolesti, becoming independent only in the course of the 20th century. Its dance traditions are known all over Ghimes and Ciuc. According to Gyula Tankó, in 1763, before the Siculicidium, 278 families went over the pass.
Down the Trotus Valley there are several small alpine scattered settlemets one next to the other named after streams. These all deserve our attention. Many of them preserve the name of their first settlers. These scattered subalpine settlements, valley colonies are marked by asterix.
- Récepataka. It is the first small settlement after Fagetel which spreads from the Orthodox chapel towards west. In 1898, it was registered as other inhabited place of Lunca de Sus. The small stream flows into the Trotus on its left.
- Izvoru Trotuşului (Sántatelek). It used to have the name Juda for almost 250 years. All its 685 inhabitants are Magyars. This is the first settlement of Lunca de Sus crossed by National Road 12. It lies at 999 m altitude.
- Komiat, Gura Comiat, Valea Comiat (Komját or Komjátszáda). We touch it after a 2 km long section along National Road 12. Its 387 inhabitants are all Magyars. In 1898, it was registered as other inhabited place of Lunca de Sus with the name Komjádpataka.
- Rajkópataka or Farkaspataka. The stream springs from the Bothavas. The houses were built at 100-150 m distance from one another.
- Bothavaş (Bothavaspataka). The stream springs from Bothavas (1,272 m) and it flows into the Trotus on the left. In its valley there is a forest road leading to Csügés.
- Rina (Ránapataka) or Ciherekpataka. It is a valley opening to the west (left) from under Bothavaş. A forest road leads up to the Paganului Mountain. There used to be a military gathering place here.
- Valea Gârbea (Görbepataka). Valea Gârbea is a road-village formed in a pictoresque narrow valley to the left (west) of the Trotus. It has a population of 390 people, all Magyars. The Ghimes railroad from Livezi goes down into this valley. The no.124 county road leads to Livezi through the valley.
- Valea Ugra (Ugrapataka) or (Ugravölgye). It was populated to the right (east) of the Trotus. Valea Ugra has 602 inhabitants, all Magyars. We can reach the Apahavas (1,330 m) along the crest in the north. There used to be several water-saws in the valley.
- Szőcsökpataka. It is situated in the small valley lying to the right (east) of the centre of Lunca de Sus. The Ugra mountain forms its border in the south, the watershed of the Gáborok Stream in the north.
- Gáborokpataka. It is situated in the valley spreading to the right (east) of the centre of Lunca de Sus.
The line of the villages continues in the valley: first we reach Lunca de Sus, the commune centre itself (out of its 722 inhabitants 713 are Magyars). Its main road is called Păltiniş-Ciuc, this being the "centre" of Lunca de Sus, even the name of the station is Păltiniş.
The methods and motives decorating the Ghimes Csángó "written" eggs were studied by Dénes Kovács. Among them we can mention the rose, frog's bottom, snake, horseshoe, hen's leg, lamb's leg, swallow's tail, smoky, star, devil's knee, cuckoo's tongue etc.