The Ven (Hven) island where he built his observatories is well worth visiting. There's not much left of the observatories, but it's a really beautiful island. I went there in the early 2000s. There are ferries from Landskrona/Helsingborg/Copenhagen.

https://en.wikipedia.org/wiki/Ven_(Sweden)

The island was historically under Danish rule. Danish astronomer Tycho Brahe (1546–1601) built two observatories there, Uraniborg and Stjerneborg, during 1576–1596. The observatories were built by the inhabitants of the island with Tycho Brahe as their Lord.

The Swedish took over control in 1658, as the rest of Scania was ceded to Sweden by the Treaty of Roskilde. The island was not specifically mentioned in the treaty, and according to the Danes it was not part of Scania, but part of Zealand and therefore still under Danish rule. The Swedes did not agree with that interpretation, and sent troops to occupy the island on 6 May 1658. The transfer to Sweden was confirmed in 1660 by the Treaty of Copenhagen.

It's particularly unfortunate that Uraniborg does not exist any longer. It was glorious (supposedly):

https://sv.wikipedia.org/wiki/Uraniborg#/media/Fil:Uranienbo...