After the owner of this Art Nouveau home died, it was turned into a museum displaying a lifetime dedicated to art.

This museum contains a vast array of puppets and marionettes from all over the world, featuring incredible works by Portuguese creators.

This little-known national museum houses over 40,000 works of art from across the world.

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

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

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

The best place in the world to buy tinned fish.

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

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

The world's oldest bookshop still in operation.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A historic neighborhood church is reborn as a psychedelic arts collective.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A historic Montreal market that was the city's agricultural hub for over century.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Every year, the colorful murals of Montreal get a complete makeover.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.