Along the walk to Manly, from Fairlight looking across
North Harbour to North Harbour Reserve in the distance
(more photos below)
Sydney Harbour National Park offers expansive view of Sydney Harbour where there are various walks to be enjoyed.

North Head Sanctuary https://www.harbourtrust.gov.au/our-places/north-head-sanctuary/ is managed by the Sydney Harbour Federation Trust, a body dedicated to protecting  and improving public access to former defence sites - beautiful walks, breathtaking views, bike-riding paths, fascinating historical sites are all in store including guided tours of Bushland, Barracks and Batteries and of North Fort.

Other attractions include:
The restored quarantine station - Q Station - is also another very interesting piece of history worthy of exploration together with walking tours where features from the first white settlement can be seen - interesting lectures are held and joining conducted tours can be arranged by visiting: https://qstation.com.au/, - bookings are essential.

Meanwhile, the North Head Sanctuary Foundation http://northheadsanctuaryfoundation.org.au partners by providing enjoyment and splendour of North Head’s bushland - come on a 2-3 hour walk led by Sanctuary Foundation member - bookings essential.

The Manly to Spit Bridge is one of our most popular walks where Aboriginal carvings from thousands of years ago can be seen - small secluded beaches are dotted along the way -  https://www.northernbeaches.nsw.gov.au/things-to-do/recreation-area/manly-scenic-walkway

Local golf clubs listed below 
https://hellomanly.com.au/listings/things-to-do/golf/

Manly bike hire/tours
https://www.manlybikes.com.au/pages/bikehire

Manly kayak hire                          and         Spit kayak hire
manlykayakcentre.com.au                www.sydneyharbourkayaks.com.au

Hop Skip & Jump Bus Service to all surrounding areas departs every five minutes.  Nearest pick up is a mere 100 metres from 'condamine bnb' - https://www.northernbeaches.nsw.gov.au/services/roads-and-paths/transport

Manly to the Spit Walk
Along scenic Walk to Manly Beach
Along scenic walk to Manly Beach
Fairlight Beach enroute to Manly
Fairlight Beach swimming enclosure
Manly to Circular Quay ferry docking at Manly Wharf
Manly Beach on a rare quiet day
Paddle boarding at Manly Cove
Walking track to Forty Baskets Beach
Forty Baskets harbour pool, barbecue and picnic area
Forty Baskets Beach and picnic area
Sunset, from Clontarf Reserve looking west to The Spit, Mosman
Sunset, Clontarf Beach looking across to the Spit, Mosman
Dobroyd Point looking to entrance of Sydney Harbour - North Head left, South Head right
Grotto Point from Tania Park reserve (can be reached by walking trail)
Aerial photo of North Harbour Reserve
North Harbour Reserve, barbeque, picnic and playground area
From North Harbour Reserve looking north towards Fairlight at low tide
Forty Beans gourmet Cafe cross the road from North Harbour Reserve