[3] The most outstanding summits in the municipality are Herniozabal (1,010 m), Herniotxiki (820 m), Enaizpuru (731 m), Alluts (687 m) and Beleburu (619 m) to the west and Mendiola (431 m) to the east.

A quarter of the surface of Hernio-Gazume Special Conservation Zone (Nature 2000) is located in the municipality of Alkiza.

[4] As mentioned above, Alkiza is a karst area, so the rain and thaw waters go underground to a large extent.

The first movement occurred because of the debts derived from the War of the Convention, and so in 1797 the local assembly authorized the City Council to sell communal land.

At the end of the 18th century, half of the municipality's land was public and between 1799 and 1845 the City Council auctioned 682 communal plots, 5.3 km2.

The Carlist guerrilla leader Santa Cruz priest was suspected to be somewhere in Hernio area and the miqueletes (police corp) and the liberal troops went looking for him.

Alkiza was supplied with electrical energy produced by Mandabe stream until 1971 when the Spanish large power company Iberduero installed two transformation centers in the municipality.

In 1775 the City Council issued a decree that organized the collection of fern, dead leaves, and the like for the livestock beddings from the communal land.

At the time the quotas for the payment of the local doctor were established in 1847, the municipality was divided again into four neighbourhoods: Azaldegi, Aldapa, Arana and Herriburua.

In addition to the urban nucleus, called Plaza by the neighbours, Alkiza is currently officially divided into five neighbourhoods: Aldapa (it borders Larraul), Arana (flat area on the Anoeta road), Azaldegi (on both sides of the road to Asteasu), Hernio (at the foot of Hernio) and Sakamidra (adjacent to Goi-bailara neighbourhood of Anoeta).

The alkizarras began to go to work in both industry and services located in nearby towns such as Asteasu, Anoeta or Tolosa.

Unlike in other Gipuzkoan regions, it doesn't seem that shepherding had a great weight in the economy of the Alkiza farms.

Charcoal was an important monetary supplement for the farmers of Alkiza, who sold it to the industry and homes in nearby municipalities such as Tolosa.

Between 1945 and 1950 a group of entrepreneurs, including the mayor of Alkiza, Mateo Aranburu, built a system of cables, pulleys and posts used to take down beech wood from the forests of Hernio to the Konporta farmhouse in Asteasu.

In the last decades of the 20th century, Alkiza had a small industrial estate next to the Umanea neighbourhood of Asteasu, which is no longer active.

In 2020, two farms, the Lete rural hotel, Inazio Urruzola Txakoli winery,[9] the municipal restaurant, Elektralkiza mini hydroelectric plant and a sharpening company make up the productive fabric of Alkiza.

The municipal ordinances established that the successive mayors had to reside in the town, in such a way that Jerónimo Alkizalete succeeded Irazusta.

Until the mid-nineteenth century, mayors were elected in the first days of the calendar year and to be candidates they had to be noblemen and first-class farmhouse owners.

On August 27, 1936, after the Spanish Civil War broke out, the Junta de Burgos, authority faithful to the coup plotters, proceeded to dismiss José Tolosa and the other councilors: Krispin Sorarrain, José Luis Iruretagoiena and Simón Ugalde, and to appoint as mayor, Matías Aranburu.

The agreement that he signed with the city council details his obligations and rights: to teach children Christian doctrine and to read, write and count.

In 1816 the brothers and neighbours of the town Juan Bautista and José Antonio Legarra had Migelena house rebuilt.

At Ahotsak portal[12] there are recordings of 8 persons, 5 men and 3 women born between 1917 and 1941, which are samples of the traditional Basque variant spoken in Alkiza.

It has a semicircular arch and gothic-style ground floor panels, as well as pillars and wooden beams from the 16th century.

The parish church of San Martin de Tours is Gothic in style and it acquired its current form in the second half of the 16th century.

The current altarpiece of the church is the work of Miguel de Irazusta, a local architect based in Madrid.

Between 1998 and 2000 the church of San Martín underwent a profound restoration that was partly financed with funds from the European Union.

A few years after the commission to Carrera, on June 22, 1771, the bishopric of Pamplona prohibited giving mass in the hermitage because it was in a precarious architectural situation.

The first documented reference appears in the ordinances of 1735, where the practice of pelota was prohibited in the portico of the church during the hours of worship.

However, the first pelota court with a left wall was not built until 1922, financed by Echezarreta, Larrion and Aristi a paper mill from Irura, within the operation for the construction of the Elektralkiza hydroelectric power station.

The Telesforo Arregi, a local professional pelota player, commented the following in an interview carried out in 2003:[22]‘In the surrounding villages there were no fronton with a left wall and the one that had a liking ... all to Alkiza.