Observatorielunden, Urban park and hill in Vasastan, Stockholm, Sweden

Observatorielunden is an urban park on a hill in central Stockholm that extends along Sveavagen. It consists of two distinct sections: the upper part features a traditional landscape garden with winding paths and mature trees, while the lower portion includes a large pond with a stream flowing downhill and grassy areas for relaxation.

The Old Stockholm Observatory on the hill dates from 1753, and a meteorological station there has measured temperature daily since 1756, the oldest continuous record of its kind. A newer observatory in Saltsjöbaden was completed in 1931, and the Observatory Museum opened in 1991. The park occupies one of the last remnants of the Brunkebergsåsen esker.

The park takes its name from the Old Stockholm Observatory, completed on the hill in 1753. The area around it was known as the "Quarter of Knowledge" in the early 20th century for its academic institutions. Since 1991 the Observatory Museum has been open to the public.

The park is open year-round and located directly on Sveavagen in the city center, making it easy to access. The upper sections with shaded paths are convenient for walking, while the lower areas near the pond work well for picnics and sitting.

The bronze Kentauren (1936) by Sigrid Fridman stands on the hill's northeastern corner; it is a centaur, not a horse. The hilltop observatory keeps a meteorological station that has recorded temperature daily since 1756, the world's oldest continuous temperature series, still measured today.