Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

This communist country can still appreciate its fragrant past.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Cuba's historical trains remind natives of their country's sugary sweet past.

An ancient Egyptian temple sits within a modern European museum.

A former plague hospital turned medical museum.

The attic of a four-century-old canal house hides a clandestine church.

The spectacular history of spectacles on display.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Amsterdam's former hotspot for public executions and dissections.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Cat art as far as the eye can see.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A hidden three-foot-wide house separates these two regal churches.