[citation needed] The customs post was the only building in Blockhusudden until the beginning of the 19th century.
Its positioning makes it a mandatory point of entry to Stockholm for all ships arriving from the Baltic.
[citation needed] The Eolslund Villa was the site of an alarm to warn Stockholm residents of impending danger.
Thiel Gallery is an art museum located at Blockhusudden in the royal park of Djurgården.
[2] The eastern part of Blockhusudden is called Plommonbacken and has many country houses built in the 18th and 19th centuries.