A new zipline that connects Sanlucar de Guadiana, in Andalucia, Spain, to Alcoutim, in Algarve, Portugal was launched in 2013 by Limite Zero. Limite Zero is a project of Englishman David Jarman, which offers those who dare a 2,362-foot-long zipline crosses the Guadiana River at 50 feet above sea level reaching speeds of up to 45mph.
How it works:
A 4×4 takes you to the departing platform, set near Spain’s San Marco Castle, and in less than a minute, you arrive on the Portuguese side, no passport required. (Speeds can reach up to 45 miles per hour.) A short walk takes you to Alcoutim village, where a small passenger ferry awaits anyone who needs a ride back to Spain; fare is included in the 20 euro price.