One of downtown Berlin's last reminders of its Communist past.

A fascinating insight into daily life in the Eastern Bloc.

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

Tiny memorials honor individual victims of the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

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

Cold war icon and onetime "hole" in the iron curtain.

A slice of central Asia in the middle of Berlin.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

A monument to the man who almost killed Hitler.

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

This mysterious medieval grotto holds a grid of sacred wells of unknown purpose.

It is said that coins washed in the waters here will miraculously multiply.

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A hotel with a rich Wild West history of miners and bootleggers.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

This enigmatic building features numerous architectural styles.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

This iconic clock tower is the largest in the Philippines.