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

A beautifully eclectic mix of architectural styles.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

The world's only museum devoted to the wonders of fluorescence.

An epic sculpture depicting a wagon and straining oxen.

This museum honors the young maritime hero who became an unexpected Victorian-era celebrity.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

This 11th-century structure is one of the oldest churches in Romania.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

One of the most controversial statues in Romania is an emperor with no clothes.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This small Catskills village has six independent bookstores and more bookshops than restaurants.

This once-derelict building is now one of the most beautiful bookstores in the world.

An Argentinian businessman facing terminal cancer built this whimsical medieval village using salvaged materials.

Honor one of Argentina's most prolific writers at his historic home.

A neo-Gothic castle in the Argentinian countryside.

The first (but not only) upside-down house in Germany.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).