The Stockholm archipelago, Stockholms skärgård or skärgården, is a group of thousands of islands in the Svealand region, extending east of Stockholm in the Baltic Sea. While many of the islands are relatively small, two large ones, Värmdö and Vaxholm, stand out as major destinations.
For hardcore swimmers, '''[http://www.otilloswimrun.se/ ÖTILLÖ]''' (literally ISLAND TO ISLAND) is an all-day swim-run race where teams of two swim between and run across many islands in the Stockholm archipelago. The swimming portions total 10 km and the running portions total 65 km. ÖTILLÖ is considered one of the toughest endurance races in the world.
A mine on Resarö, with one unusual distinction: nine chemical elements of the periodic table were discovered here, four of them named by the settlement: ''yttrium'', ''ytterbium'', ''terbium'' and ''erbium''.
A Grand Old Hotel, remembered in Swedish history for the 1938 Saltsjöbaden Agreement, ''Saltsjöbadsavtalet'', an agreement between employers and unions to ensure peace on the labour market.
Restaurant and guest house located on the island Nässlingen, near Ljusterö
Impressive from outside, though not usually open to the public.
Reminds of the closed-down Gustavsberg porcelain factory.
Since the Ice Age ended, the land has been rising from the Baltic Sea, changing the sceneries over generation; see Nordic countries#Geography.
In modern times, the archipelago consists of at least 24,000 identified islands, islets, and skerries.
From the Middle Ages until the end of the Cold War, the Swedish military has had troops, ships and fortifications in the archipelago, to defend Stockholm. The only major enemy attack on Stockholm was committed by the Russian Empire, in 1719 to 1721. Today, most defense facilities are closed down. The local population relied on subsistence fishing and farming, isolated from Stockholm's tremendous progress in the 19th century, as tourists started to colonize the area. During the 20th century, many of the outer islands were de-populated, and transformed to summer resorts, with very small population during winter. Today, most island-dwellers commute to Stockholm for work, and enjoy maritime life as a hobby. In contrast, many of the inner islands have become suburbs of Stockholm.