Pull, kick, breathe.
There is an outdoor, public pool about a block from my apartment. It is an old pool, with a pool house (or at least the large stone structure was at one point; for what it is used now, I have no clue) on the west end of the pools. During the days the pool is open to kids and adults and whoever just wants to cool off. At 7 o'clock on the weeknights the parks department limits pool-goers to adult lap swimming. The lanes run east/west. Tonight I swam freestyle lengths going eastward and breaststroke lengths going westward for about 40 minutes and watched as the sun set behind the building.
Having not yet joined a gym here, exercise has mainly consisted of outdoor running, dance classes, and now swimming. I could go on like this forever but weather will not allow it and I do like access to a steam room and sauna in the winter. It'd been a few years since consistently swimming (about 6 to be precise) for exercise and I am happy to say that it's just like riding a bike. But in a pool. With measured breathing.