Observatorielunden is bordered by the streets Odengatan to the north, Sveavägen to the east, Kungstensgatan to the south, Drottninggatan to the southwest, and Norrtullsgatan, Sandåsgatan and Gyldéngatan to the west.

The Old Stockholm Observatory, which dates from 1753, sits on top of the hill.

On the northeastern corner of the hill stands the bronze sculpture Kentauren from 1936 by Sigrid Fridman (1879-1963).

[2] At the Old Stockholm Observatory there's also a meteorological station which has measured temperature daily since 1756.

A newer observatory was built in Saltsjöbaden outside Stockholm and completed in 1931.