Beneath the streets of New York City lies the skeleton of one of the most ambitious communication systems in U.S. history: a 27-mile pneumatic mail network that once moved 100,000 letters a day—using nothing but air pressure. From 1897 to 1953, steel canisters shot through underground tubes at 35 miles per hour, connecting 23 post offices across Manhattan and Brooklyn. It was fast, reliable, and nearly invisible to the public.

So why did this futuristic mail system vanish? And how did something so ahead of its time become obsolete in just a few decades? In this episode, we explore the rise and fall of New York’s pneumatic mail system—from ceremonial cat launches and same-day Wall Street contracts to deadly tube explosions and sandwich deliveries gone rogue. Plus: what’s still down there today.

Hidden beneath the chaos of Grand Central Station, Michelin Starred restaurant Joji delivers one of New York City’s most refined omakase experiences. In this rare behind-the-scenes look, we spend the day with Chef Wayne Cheng, as he takes us inside the kitchen of his ultra-exclusive sushi counter.

From breaking down whole fish, to preparing prized Japanese kegani (hairy crab), and taste-testing fresh uni, Chef Wayne gives us a raw, unfiltered look at what it takes to serve some of the city’s best sushi. He shares why it took him three years to master the art of sushi rice — a cornerstone of Japanese cuisine — and works with his team to build a perfect omakase course.

Co-founded with Chef George Ruan, another veteran of the legendary 3-Michelin-starred Masa, Joji represents a new chapter in NYC’s sushi scene: intimate, obsessive, and rooted in deep culinary tradition.

From trains and traffic to concerts and sporting events, many cities around the world are dangerously loud. Noise pollution can have a huge impact on health and quality of life - causing stress and increasing risk for heart disease and other issues. So what are some of the tools that engineers have to limit loud noise? Raj Patel, an acoustics expert who helped design Manhattan’s Little Island waterfront park, explains how noise pollution can be minimized in metropolises like New York City.