For an interesting garden combined with a bit of art you could do worse than visit The Himalayan Garden & Sculpture Park at The Hutts, Grewelthorpe near Ripon North Yorkshire.
Beware the gardens close from June until April each year as the Himalayan plants are only at their best in spring, so watch the time.
The rhododendrons are worth visiting when in full bloom so it is worth picking your time for a trip although the attached nursery is open by appointment.

Stainless toadstools reflect well in the garden.

The whole garden is a sculpture. Hewn out of the valley side it comes as a surprise that there is such a garden and sculpture park at The Hutts .

The many water features in the garden are well augmented by sculptures and statuary. See the May flies in May.

It will be a dark day in the garden before the stone eggs under the sculpted duck hatch.

All gardeners need a hand every now and then. A big hand is even better.