There are caves to jump out of, footbridges to run across and lots of shingly beaches to swim from.
From the guardian.co.uk
The soil is sandy in places, shingly in others, just like the ground would have been before the Thames was tamed.
From the guardian.co.uk
Even though it is tiny and shingly, this cove on the steep northwest coast has fantastically clear water and magical light.
From the telegraph.co.uk
How do I know that the shingly beach that runs diagonally across painting No 19 extends out of the frame, on and on to a vanishing point?
From the guardian.co.uk
The beaches adjacent to Ashburton are steep and shingly with a strong undertow, making them unsafe to swim, but suitable nonetheless for surf-casting.
From the en.wikipedia.org
Napier arrived a generation after the battle, set up in 1853-56, again because of the harbour but it did not take long for ships to out-grow the shingly haven.
From the nzherald.co.nz
More examples
Gravelly: abounding in small stones; "landed at a shingly little beach"
Covered (or mostly covered) with shingle or small pebbles