A Manhattan Episcopal church with an eerie underground crypt.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The notorious headquarters of a corrupt political machine.

The most confusing clock in New York.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

Red frames showcase remnants of one of New York's original subway stations.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A hidden "place of interment for gentlemen."

Become a prohibition rebel.

The competition: breathe deeply as long as you can.

A dentist's hated concrete colossi are now beloved icons of the community.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

A comprehensive collection of Pez dispensers.

The largest and most famous wax anatomical collection anywhere in the world.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Two stunning 17th-century libraries and a cabinet of curiosities.

A saintly relic hidden in a Prague church basement.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.