A living art gallery painted on a canvas of Monterey pine trees.

This interactive museum highlights the history and philosophy of one of the world's most difficult sailing races.

This Spanish shoe museum has history, has design, and has a pair of Rafael Nadal's tennies!

A subterranean relic of the Spanish Civil War hides below this picturesque park.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

Drink among marionettes at this pub inside a historic puppet theater.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Lavish royal estate punctuated with heated greenhouses.

Climb inside an iron crystal magnified 165 billion times its normal size.

This coffee shop lies hidden beneath a historic church.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

These morbid carvings remind churchgoers of the inevitability of death.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

This secluded walkway overlooks a magnificently wild London green space.

A historic arboretum and non-conformist, non-denominational park cemetery.

A network of concealed passageways lies within a busy London Underground station.

Abstract dinosaur models in London.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

This hidden green space is the city's second largest conservatory.