Running into a little problem. So there is a park in the New Market section of the Lehigh Line in Piscataway, NJ called Columbus Park. By the parking lot is a large gazebo and I'm trying to figure out what I can do to duplicate it. Anyone have any ideas?

Also the water kind of goes down a stepped waterfall to go from the lake to the stream:

There is some other small gazebo's and structures through out the whole lake area too:



I've got ideas for the other structures above (except the gazebo).
Just looking for some pointers. I'm drawing a blank

Ken