This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

One man's remarkable private collection of art from around the world.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

The best place in the world to buy tinned fish.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

One of the smallest bookstores on the planet.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This cheese shop also houses a museum devoted to Dutch dairy.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Cat art as far as the eye can see.

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

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This indoor ski resort has a mountain contained inside a mall.