Käsmu Sea Museum is located in a former border guard station building from Soviet Occupation period and presents the history of the village. The museum exhibits reflect all the areas connected to the sea - seafaring, fishing, smuggling trade and also the sea as a part of nature and as an object of photography and visual arts.
The Peace Palace (Vredespaleis) is an administrative building and often called the seat of international law because it houses the International Court of Justice (which is the principal judicial body of the United Nations), the Permanent Court of Arbitration, the Hague Academy of International Law, and the extensive Peace Palace Library. In addition to hosting these institutions, the Palace is also a regular venue for special events in international policy and law. The Palace officially opened on 28 August 1913, and was originally built to provide a symbolic home for the Permanent Court of Arbitration, a court created to end war which was created by treaty at the 1899 Hague Peace Conference.