USA - California

A view of Los Angeles, California courtesy of my friend Melissa.

USA - Texas

Houston

US-2619200

Lithuania

LT-347700

Yeah, neither I nor the sender have any idea what is going on in this postcard or why anyone would make a postcard of it.
The back actually says, in the senders handwriting, "Who would come up with a postcard like this?!"

I couldn't agree more.

India

IN-84008

Western Ghats, a UNESCO World Heritage site

USA -Massachusetts

US-2428914

Claude Monet, The Bridge at Argenteuil, 1874

Germany

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DE-2568226

Gustav Klimt, The Music

Russia

RU- 2047385, From Olga

The Second World War Victory memorial against the background of Ochakova-Matveevskoye district.

Card came complete with a little Russia hand-drawn flag on the back.

Finland

A wonderful vintage advertisement circa 1930.  

FI-1927239

Poland

A direct swap card from Ania in Warsaw, Poland.  

The card says "Happy Postcrossing from Poland" (which is awesome!)

The card says it is a Łowicz-style paper cut-out design.  If I'm correct, this is Wycinanki, a Polish art of paper cutting and is breathtakingly beautiful. 

Serbia

Direct swap, Serbia