Stockholm's deepest subway station is also a stunning ecological wonder.

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

When it comes to handsignals (and colonialism) rock always beats scissors.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

A mesmerizing sculpture marks the site where the activist was arrested after evading capture for 17 months.

A dead saint, a deadly poison, and a mysterious holy ooze.

Geometry and mystery come together in an epic show of octagonal masonry.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A spiritual sanctuary in a natural cave.

The gravestone of a famous poet features a fittingly poetic epitaph chosen by the writer himself.

Caves famous for the dragon-slaying saint who lived there.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

A study of Fascist era Art Deco design in Italy.

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Every inch of this chapel is covered in craftsmanship from across the world.

Elaborate patterns adorn the city's disappearing traditional architecture.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

The only completed wing of Utah's first capitol is filled with artifacts and odd stories about its past.

A museum in rural Utah documents the history of the Japanese Americans who were forcibly relocated there.

Hotel designed around a 16th century Mexican bullring.