An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

A Manhattan office building is home to the world's largest chess board.

The most confusing clock in New York.

Visit the monolithic tomb of America's most famous general.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Unique antiquarian shop specializing in globes, maps, and prints.

One of the last Jazz Age "Wonder Theaters" in New York City.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Nikola Tesla's former home contains an homage hidden from plain sight.

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

A dilapidated dock tells the story of Titanic's missed arrival.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

New York's oldest magic store.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

A kaleidoscopic warehouse-maze of handmade neon signs.

A tower devoted to — and modeled after — the Divine Comedy.