The world's first permanently occupied mountain-top observatory continues to report on the stars.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A classically inspired temple in Redwood City.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

A Roman-inspired temple once controlled half of San Francisco's waters.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

A hidden world of exotic succulents and cacti.

This giant shopping mall still holds signs of its automotive past.

A humble garage, world-famous for being the epicenter of a technology revolution.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

A giant chess set, minus the psychedelic drug trip.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

From the Difference Engine to the Cray-1, all under one roof.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.