A walk through the historic city center, under the streets of Seattle.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ancient tomb acts as a calendar that keeps perfect time.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A slice of central Asia in the middle of Berlin.

The most visited, and possibly most controversial, museum in Germany.