After enjoying a scenic cruise through the Delta, you can explore medieval Middelburg, which was the second largest trading city of the Dutch East India Company. Or, if you feel like exploring the city on two wheels, a guided bike ride is the perfect choice. Alternatively, you may venture off to the Delta Works storm surge barrier, an impressive series of dams and Dutch hydraulic engineering. More than half of the Netherlands lies below sea level and the Delta Works were built to prevent a recurrence of the 1953 flood disaster.