Get in line for Lisbon’s most famous sandwich.

The best place in the world to buy tinned fish.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The world's oldest bookshop still in operation.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

This giant sculpture made of trash is a critique of society's wastefulness.

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.

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

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

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A modest reminder of treacherous waters at the Golden Gate.

Faceless white figures loom over the city from the rooftop.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This private residence was the template for one of the most beloved television homes of all time.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A man throwing a giant severed hand towers over Antwerp’s main square.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Most prolific publishing house in the 1600s open to the public.