The Sunny Lakes in Senec is one of the most famous resorts of tourism in Slovakia. The area of the Sunny Lakes makes borders with the town Senec on the east. The extent of water area is more than 100 hectares.

The area of the Sunny lakes (Slnecne jazera) is divided to southern and northern part. There is a naturist beach located on the back lake "Deep Lake" behind the railway on the Southern part. Here is the shore only the sandstone without stones. People have learned to walk more to the back lake, which is not forbidden. The location is very popular especially thanks to perfectly clean water, despite the lack of greenery.