Cantacuzino Castle is a historic landmark and popular tourist attraction located in the town of Busteni, Romania. The castle was originally built in the late 19th century by Prince Gheorghe Grigore Cantacuzino, a prominent politician and diplomat in Romania's history.

The castle's architectural style is a combination of Neo-Romanian and Neo-Byzantine elements, with its most notable feature being the 70-meter high tower that provides stunning views of the surrounding Carpathian Mountains.

After Prince Cantacuzino's death in 1913, the castle changed hands several times, serving as a residence, hospital, and even a museum during World War II. In the 1990s, the castle was restored and opened to the public as a museum of local history and art.

Today, visitors to Cantacuzino Castle can explore its grand halls, ornate bedrooms, and art galleries, which feature exhibits on local history and culture. The castle also hosts concerts, art exhibitions, and other cultural events throughout the year.