1. The Yerevan Cascade is a giant stairway in Yerevan, Armenia, connecting the downtown Kentron district to the Monument neighborhood. It was originally built in the 1970s and was renovated and reopened in its current form in 2009. The Cascade is a popular gathering place for locals and tourists alike, offering beautiful views of the city and Mount Ararat, as well as housing a museum and various art installations.

2. The Yerevan Cascade is open to the public 24 hours a day, 7 days a week. There is no admission fee to visit the Cascade. While there is no specific phone number for the Cascade, the surrounding area is easily accessible by public transportation or taxi.

3. As mentioned above, there is no admission fee to visit the Yerevan Cascade. The site is easily reached by public transportation, with several bus stops and metro stations nearby. Taxis are also readily available in the area.