Wikipedia says this:
The Mount of Temptation is said to be the hill in the Judean Desert where Jesus was tempted by the devil (Matthew 4:8). The exact location is unknown, and impossible to determine. It is generally identified with Mount Quarantania, a mountain approximately 366 m (1 200 feet) high, located about 11 km (6.8 mi) north-west of the West Bank town of Jericho. According to the public domain Catholic Encyclopedia, Quarantania is "a limestone peak on the road from Jerusalem to Jericho".
It is mentioned in a poem of the Temptation event by Henry Wadsworth Longfellow. See Christus: A Mystery (I:1:2 Mount Quarantania).
Atop the mount is the Greek Orthodox Monastery of the Temptation or "Qarantal". Above Qarantal, on top of the cliff, is a wall, that sits on the ruins of the Hasmonean (later Herodian) fortress, Dok – Dagon.
In 1998 a 1300 meters long cable car was built from Jericho's Tel Sultan to the level of the monastery by an Austrian-Swiss company as an tourist attraction for the year 2000 and as an alternative tourist destination for Massada.