A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

In Little Caribbean, an ice-cream shop serves up regional flavors, including soursop, Irish moss, and "greatnut."

Ride the subways of yesteryear.

New York City's only radical feminist independent bookstore.

The impeccably spiced roast pork buns at this bakery are worth the wait.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Play heads or tails with thousands of different coins.

Supremely flaky treats await at Amadou Ly’s boulangerie and patisserie.

New York City's smallest piece of private property.

A hands-on traveling collection of the innovative devices of yesteryear.

The first museum in the United States dedicated entirely to posters.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

Cooks at this tiny takeout spot grind their rice flour in a stone mill each morning for perfect cheung fun.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

All of the Malaysian sweets at this shop are made daily with a whole lot of love.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A 150-square-foot masterpiece of American landscape art is the crown jewel of this library and art gallery in Vermont.

Large Massachusetts museum dedicated to Armenian history and culture.

Volunteer-run library dedicated to exploring five decades of activism history.