Lyaskovets Peak in the context of "Huron Glacier"

Friesland Ridge (Hrebet Frisland \'hre-bet 'fris-land\) is a ridge on Livingston Island in the South Shetlands, part of the Tangra Mountains. The summit, Mount Friesland, which rises to 1,700 metres (5,600 ft), is the northwesternmost of the ridge's six main peaks. Its elevation was estimated at 1,684 metres (5,525 ft) by a 1995/96 Bulgarian survey; the present figure was produced by a 2003 Australian GPS survey, and closely matched (as 1,702 metres (5,584 ft)) by the Bulgarian survey Tangra 2004/05.

The local ice relief is subject to changes, causing variations in the mountain peaks’ elevation. According to a Bulgarian GPS survey by D. Boyanov and N. Petkov the elevation of Mt. Friesland was 1,693 metres (5,554 ft) in December 2016, making the peak lower than the adjacent St. Boris Peak (the latter's northernmost ice formation ‘The Synagogue’ rising to 1,699 metres (5,574 ft)) at that time.

Tangra Mountains (in Bulgarian Тангра планина, 'Tangra planina' \'tan-gra pla-ni-'na\) (62°40′00″S 60°06′00″W / 62.66667°S 60.10000°W / -62.66667; -60.10000) form the principal mountain range of Livingston Island in the South Shetland Islands, Antarctica. The range had been nameless until 2001, when it was named after Tengri (Bulgarian Tangra), "the name of the ancient Bulgarian god."

Tangra Mountains are 32 kilometres (20 mi) long between Barnard Point and Renier Point, 8.5 kilometres (5.3 mi) wide, and are bounded by Moon Bay and Huron Glacier to the north, Huntress Glacier to the northwest, False Bay to the west, and Bransfield Strait to the southeast, and is linked to Bowles Ridge by Wörner Gap, and to Pliska Ridge by Nesebar Gap. The mountain is divided in three principal ridges: Friesland Ridge in the west, Levski Ridge in the centre, and Delchev Ridge in the east.

Tundzha Glacier (Bulgarian: ледник Тунджа, romanized: lednik Tundzha, IPA: [ˈlɛdnik ˈtund͡ʒɐ]) is a glacier on Livingston Island in the South Shetland Islands, Antarctica situated east-southeast of Berkovitsa Glacier, west of Saedinenie Snowfield, northwest of Pimpirev Glacier, north of Kamchiya Glacier, and east-northeast of Verila Glacier. It is bounded by Snow Peak to the west, Teres Ridge to the east and the glacial divide between the Drake Passage and Bransfield Strait to the south. The glacier extends 7.5 nautical miles (13.9 km; 8.6 mi) in east-west direction and 2.4 nautical miles (4.4 km; 2.8 mi) in the north-south direction, and drains northwards into Hero Bay between Avitohol Point and Siddins Point.

The feature was named after the Tundzha River in Bulgaria.

Mount Friesland is a mountain rising to 1,700.2 metres (5,578 ft) in the homonymous Friesland Ridge, one of the two summits of Tangra Mountains and Livingston Island in the South Shetland Islands, Antarctica along with neighbouring St. Boris Peak. Its north rib is connected to Pliska Ridge by Nesebar Gap on the west, and to Bowles Ridge by Wörner Gap on the north. On the east, Mount Friesland is connected to Presian Ridge and further on to Catalunyan Saddle and Lyaskovets Peak. On the south-southwest, it is connected by a short saddle to ‘The Synagogue’, a sharp-peaked rock-cored ice formation abutting St. Boris Peak. The peak is heavily glaciated and crevassed, surmounting Huntress Glacier to the west, Perunika Glacier to the north-northwest, Huron Glacier to the northeast and Macy Glacier to the southeast. The local weather is notoriously unpleasant and challenging; according to the seasoned Antarctic mountaineer Damien Gildea who climbed in the area, "just about the worst weather in the world".

Peshev Ridge (Peshev Rid \'pe-shev 'rid\) is a crescent-shaped ridge in central Tangra Mountains extending 2 km (1.2 mi) along the northeast coast of Brunow Bay and southeast of Macy Glacier, Livingston Island in the South Shetland Islands, Antarctica. Its east extremity is formed by the summit St. Naum Peak (620 m or 2,034 ft), separated from Balchik Ridge to the east by Starosel Gate. The ridge was named in honour of Dimitar Peshev (1894–1973), who led the nationwide campaign that kept Bulgaria’s Jews safe during the Holocaust.

The Tangra 2004/05 Expedition was commissioned by the Antarctic Place-names Commission at the Ministry of Foreign Affairs of Bulgaria, managed by the Manfred Wörner Foundation, and supported by the Bulgarian Antarctic Institute, the Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences, Bulgarian Posts, Uruguayan Antarctic Institute, Peregrine Shipping (Australia), and Petrol Ltd, TNT, Mtel, Bulstrad, Polytours, B. Bekyarov and B. Chernev (Bulgaria).

Sofia Peak (Bulgarian: връх София, romanized: vrah Sofiya, IPA: [ˈvrɤx ˈsɔfijɐ]) is the ice-covered peak rising to 1655 m in Levski Ridge, central Tangra Mountains on Livingston Island in the South Shetland Islands, Antarctica, 470 m northwest of the summit point of Great Needle Peak with which it forms a twin peak. The feature is named after the capital city of Bulgaria.

Levski Ridge (Bulgarian: Хребет Левски \'hre-bet 'lev-ski\) is the central ridge of the Tangra Mountains, Livingston Island. Its summit, Great Needle Peak rises to 1,680m and is the second highest summit of the island after Mount Friesland.

The ridge extends nearly 8 km between Shipka Saddle to the west and Devin Saddle to the east, and the same distance between Cherepish Ridge to the north and Christoff Cliff to the south. It is bounded by Huron Glacier to the north, Iskar Glacier to the northeast, Macy Glacier and Boyana Glacier to the southwest, and Srebarna Glacier and Magura Glacier to the southeast.