Gibraltar is neither an isthmus or a 'penninsular'... but it IS a peninsula! Gibraltar, which is a British Overseas Territory at the southern tip of the Iberian Peninsula is connected to the Spanish mainland by a 1.2 km (0.75 mi) wide (roughly from east to west) isthmus much of which forms a land border with Spain.
More information on the geography of Gibraltar can be found on the link provided.
Gibraltar.
An Isthmus is a narrow strip of land that connects two larger bodies of land with water on both sides. The Isthmus of Panama, Isthmus of Corinth, Isthmus of Perekop, Isthmus of Gibraltar, Isthmus of Suez are all examples
A canal
Gibraltar, although it isn't an island. It is a peninsula which is joined to the Spanish mainland by a sandy isthmus which has been extended and is the site of Gibraltar Airport runway.
The Isthmus of Panama connects South America with countries north of Panama. The Isthmus of Panama is located in Panama, which is part of Central America.
The Isthmus of Panama connects Colombia with the countries north of Panama. The Isthmus of Panama is located in Panama.
Isthmus of Panama, Central America - the isthmus joining North America and South America, Isthmus of Corinth - a narrow isthmus between the Gulf of Corinth and the, Isthmus of Kra - a narrow isthmus linking the Malay Peninsula to the Asian
The Isthmus of Panama is the largest isthmus located in Central America.
The Isthmus Of Panama.
Isthmus of Panama
The Karelian Isthmus
isthmus Clark