Tennyson Inlet is an arm of Pelorus Sound / Te Hoiere.
Penzance's beach is of gravel, which is unusual for this area of the Marlborough Sounds.
These facilities coupled with ease of access gives the bay a great reputation for boating activities and fishing.
The native forest contains large southern beech trees, Nothofagus species; along with conifers, as well as perching plants and epiphytes.
In early summer, large numbers of the New Zealand ground orchid Pterostylis banksii are present along the walking tracks.