An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A beautiful but toxic fountain of mercury.

Collection dedicated to brands, packaging and advertising.

An 11th-century medieval castle cascades over the town of Numão.

This castle has links to Portugal’s founding and struggles for independence.

One of the world’s longest pedestrian suspension bridges.

A lush oasis full of vibrant plants and striking geometric displays.

This giant sculpture made of trash is a critique of society's wastefulness.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This crumbling Portuguese ruin overlooks the populace it once ruled.

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

A celebration of Colombia’s premier contemporary artist.

Ecuador’s historic seat of government has been quietly looted in recent decades, and no one knows how or by whom.

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

The television series' iconic giant foot was borrowed from this classical painting.

Rebuilt remains of a temple to Roman god Mithras.

A small collection of magic tricks and memorabilia is now an apartment-sized museum.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

One of the world's largest collections of pathological specimens.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

Wax models of disease and deformity are on display at this German medical museum.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Home to three historic ships from the age of Vikings.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.