Paldiski Põhjasadam

The remains of a fortress on a hill, with low overgrown ramparts. There are great views to the sea and the port functions.

Petrovskaya fortress

Amandus Adamson

Built in 1842, though its "cubist" form may make you think it's newer. The church fell into serious decay during Soviet times, and was restored into its current shape.

St. Nicholas church

Pakri Landscape Conservation Area (Estonian: Pakri maastikukaitseala) is a nature park which is located in Harju County, Estonia. The area of the nature park is 3,164 ha. The protected area was founded in 1998 to protect landscapes and biodiversity of Pakri Islands.

https://en.wikipedia.org/wiki/Pakri_Landscape_Conservation_Area