Oldenburg is a City in Lower Saxony, Deutschland, which has many sights and attractions to offer. Here are some of the most famous:

1. Oldenburg Palace: A magnificent Renaissance palace built in the 17th century, which now serves as a museum and event venue.

2. Stadtmuseum Oldenburg: A museum that documents the history and culture of the City.

3. market square: Historic square in the center of the old town, where markets and events take place regularly.

4. Oldenburg Botanical Garden: A park with over 5000 plant species from all over the world.

5. The Städtisches Künstlerhaus: A building that serves as an exhibition venue and studio for contemporary artists.

6. The horse market: A popular location at carnival time with traditional events and horse races.

Oldenburg also offers a wide range of shopping opportunities, restaurants and pubs as well as a lively arts and culture scene.