In the depths of the Sahara desert lies the Algerian oasis of Djanet, a truly astonishing location where visitors might feel as though they've been transported to a different planet.

Parts of the landscape are more Martian or lunar, with only the blue of the sky giving the game away.

Visitors, local and now foreign as well, come to recharge their batteries and explore Djanet, 2,300 kilometers by road (1,430 miles) southeast of Algiers.

But there are also flights to the oasis, which is surrounded by sand dunes and sandstone plateaus, the site of some of the world's most impressive prehistoric rock carvings.

A mini tourism boom began in eastern Algeria when the authorities started granting visas on arrival in 2021.

The COVID-19 pandemic had hit tourism badly worldwide, and Algiers decided to promote the Sahara as a destination by allowing visas to be granted at the airport.

Direct flights from Paris to Djanet were key in marketing this strategy.

Last year, over 2,900 foreigners of 35 different nationalities, mostly Westerners, stayed in Djanet, compared with 1,200 in 2021.

"Once you come to Djanet, you have to return... I'm here with two friends, and all they want is to come back as soon as possible," 57-year-old French tourist Karim Benacine told Agence France-Presse (AFP).

Visitors are also attracted by the nearby Tassili n'Ajjer National Park, Africa's largest, which borders Libya, Niger, and Mali.

Known for its lunar-like landscape with eroded sandstone orange and black "rock forests", Tassili has become a photographers' favorite at sunset.

A vast plateau of 72,000 square kilometers (28,000 square miles), the park also houses what UNESCO calls "one of the most important groupings of prehistoric cave art in the world" with over 15,000 examples.

These "record the climatic changes, the animal migrations and the evolution of human life on the edge of the Sahara from 6000 B.C. to the first centuries of the present era," UNESCO says.

In 1982, Tassili became a UNESCO World Cultural Heritage Site and a World Natural Heritage Site. Four years later, it was also added to the list of biosphere reserves.

It is not just foreigners who are drawn to the area: Algerians also find solace in their own national treasure, with 17,000 local visitors recorded last year.

'Disconnecting, rejuvenating'

For 41-year-old Samira Ramouni, a psychologist from Algiers, staying at the oasis means many things.

"Finding inner peace, experiencing complete relaxation, disconnecting, seeking calm, learning new things, rejuvenating..."

Ramouni said she came to Djanet to rest and relax "to be able to start the struggle anew."

Abdelkader Regagda runs a travel agency in Tamanrasset in southern Algeria, around 700 kilometers west of Djanet.

He now organizes excursions in the Djanet area and told AFP the authorities had opened "a great tourism route from Europe to the south" of Algeria.

Djanet is the scene at the end of July of the Sebeiba Festival, a yearly celebration of the local Tuareg culture.

The area has certainly struck a chord with tourists from Europe.

Another visitor from Paris, Antonine De Saint Pierre, 49, said her trip deep into the Algerian desert was exactly what she needed.

"Now I know that I think I'm going to do this regularly," she added.