This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

This magnificent stepwell is designed as an inverted temple and adorned with 1,500 sculptures.

The world's second-largest sundial, made entirely out of stone.

Rock-cut cave complex filled with ancient Buddhist artwork.

The remains of what was, not so long ago, the world's largest city.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Centuries-old bridges grown from tangled roots.

This monumental work of art symbolizes the coming together of a previously divided city.

This concrete residential area doubles as an open-air gallery.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Metro station with a claim to rock n' roll fame.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

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

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

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

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Concerts, art, offices, and a café in what used to be Berlin's first crematorium.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Berlin's old airport.

You've probably seen these distinctive orange-tiled columns on the big screen.