Kawasaki, Japan

The bridge on the red Kawasaki postmark is the Tokyo Bay Aqua-Line. It's a 4.4 km bridge and 9.5 km tunnel running across Tokyo bay, connecting Kawasaki to Kisarazu. In the background is Mount Fuji. And I believe what appears to be a sailboat on the left side of the postmark is actually the Tower of Wind. This structure supplies fresh air to the tunnel on the floor of the bay.

Chinese Dinosaur FDC

Kilchberg, Switzerland

Kilchberg is a town in Switzerland and part of the greater Zürich area: the canton of Zürich. It's just a short train ride from Zürich's central station. I recognized the name of the town because I've been there before. The Lindt & Sprüngli headquaters is in Kilchberg and we stopped by while in Zürich... maybe 15 years ago. Unfortunately they don't offer tours at Lindt but we did manage to get some free chocolates.

Gdańsk, Poland

More mineral stamps from Poland: agate, gypsum and malachite with azurite. Thank you Roman.

Green Succulents from the USA

Looks like circular international forever stamps are the norm for the USPS. It looks like all of the subjects on these stamps so far have been circular as well: Earth, Moon and Christmas Wreaths. And now an echeveria.