The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

The narrowest street in Paris.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.