The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The oldest restaurant in Portland serves fiery coffee cocktails and an astounding amount of turkey.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Portlandia is the second-largest copper repoussé statue in the United States.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

A sculpture of a salmon swimming through a brick building.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

From mining complex to industrial exhibition, this museum once played a major part in the X-Files.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

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

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

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

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

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

The world's oldest bookshop still in operation.

In the Monastery of São Vicente resides a gallery devoted to a breathtaking collection of seashells.

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

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.