San Francisco has a $14 billion annual budget, much of which gets swallowed by bureaucratic bloat and questionable spending priorities. But every now and then, it's worth remembering that some of the best things this city offers cost absolutely nothing — and were largely paid for by generations past who actually knew how to build things.

Case in point: Metson Lake and Elk Glen Lake, tucked into the middle of Golden Gate Park like a quiet secret most residents have never bothered to discover.

If you've only ever visited the park for the de Young Museum, the Conservatory of Flowers, or the weekend drum circle near Hippie Hill, you're missing out. The interior lakes area is one of the most genuinely beautiful hiking spots in the city right now — lush, peaceful, and about as far from the chaos of Market Street as you can get without leaving the 7x7.

The trails around these lakes are perfect for a low-key weekend walk. You'll find actual greenery reflected in still water, birds doing bird things, and — here's the kicker — relatively few people. In a city that manages to make even its parks feel overcrowded, this stretch of Golden Gate Park remains refreshingly underutilized.

Here's the fiscally responsible life hack: instead of dropping $18 on a mediocre acai bowl and calling it self-care, lace up some sneakers and go for a free walk around a 19th-century man-made lake. Your wallet and your mental health will both thank you.

Golden Gate Park remains one of the greatest public works achievements in American history — 1,017 acres of sand dunes transformed into an urban paradise. The least we can do is actually use it.

No reservation required. No $45 parking garage. No app needed. Just show up and walk. What a concept.