A black cat protests the City Guild in Riga's Old Town.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Moscow's imposing monument to the Space Age.

Former headquarters of the KGB.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

20,000 pieces in a Frank Gehry-designed building.

When flour explodes, it's not a pretty sight.

The only arched bridge made of stone on the entire Mississippi River.

Half of a waterfall goes into the river while the other half seems to disappear.

A giant granite cross remembers missionary Father Frederic Baraga, and his safe passage across an angry Lake Superior.

A treehouse assailed by the elements and the government, now gone.