Armona Island is one of the islands of Algarve, Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

. Armona is 9 kilometres in length, and from 0.1 to 1 km wide.
It is accessible by regular 20 mins Ferry trip or even quicker Water Taxi from the waterfront in Olhão

Olhão

Olhão , or Olhão da Restauração, is a city and a municipality in the Algarve region, in Southern Portugal. It is located near Faro, which is the district's capital and the capital of the Algarve. It is mostly a fishing port city...

. The island is populated with a large number of beach houses and a half a dozen cafe bars.
The main beach on the Atlantic side of the island is pristine and uncrowded, making it a popular daytrip destination for tourists staying in Olhão

Olhão

Olhão , or Olhão da Restauração, is a city and a municipality in the Algarve region, in Southern Portugal. It is located near Faro, which is the district's capital and the capital of the Algarve. It is mostly a fishing port city...

itself. The port is a very popular place in the summer when the locals and holiday makers dive/jump off it into the sea.