Victoria Falls a visa each time they cross the border; visas can be obtained at both border posts. Costs vary from US$50–$80 (). Visa regulations change frequently; visitors are advised to check the rules currently in effect in both countries before crossing the border in either direction. Additionally, foreign tourists may purchase a KAZA visa for US$50 that will permit visitors to travel between Zambia and Zimbabwe for up to 30 days as long as they remain within the covered countries. A famous feature is the naturally formed "Armchair" (now sometimes called "Devil's Pool"), near the edge of the falls on Livingstone
Victoria Falls Bridge instructing the engineers to "build the bridge across the Zambezi where the trains, as they pass, will catch the spray of the Falls". It was designed by George Andrew Hobson of consultants Sir Douglas Fox and Partners, assisted by the stress calculations of Ralph Freeman, who was later the principal designer of the Sydney Harbour Bridge. The main central arch is a parabolic curve. <ref name="http://bestbridge.net/Africa_en/victoria-falls-bridge.html">Best Bridge Africa Victoria Falls Bridge: para, accessdate: March 2, 2017</ref> The bridge was prefabricated in England by the Cleveland Bridge & Engineering Company, before being shipped to the Mozambique port of Beira and then