Oil and Water

Harbour Air DHC-3 Otter, Vancouver, British Columbia, Canada

Not only do planes float at the Vancouver Harbour Water Airport (CXH/CYHC), aka
the Vancouver Coal Harbour Seaplane Base, but the petrol station does too!

Sea the Runways?

Victoria Harbour Water Aerodrome, Victoria, British Columbia, Canada

The Victoria Harbour Water Aerodrome (YWH), also known as Victoria Inner Harbour Airport, is a seaplane airport for downtown Victoria.  You can see both runways and taxiways in this photo.