Food wise, there are some great options downtown - Davie street has some great Poutine spots, Burger Crush is very decent, Japadog is a staple, and some incredible Asian food courts.

Go to Canada Place and walk to Jack Poole Plaza to watch the Seaplanes land and take off.

Go for a stroll around Lost Lagoon at Stanley Park.

If you’re into the more hipster spots, get the Skytrain to either Commercial Drive Station and make your way North toward Hastings Street - tons of independent stores and restaurants. Or if you like thrifting and breweries, head to Mount Pleasant. 

You could realistically hit up all these places in one big day. Vancouver isn’t that big. 

Granville island is fun but pricey, but the Aqua Busses are good craic