This museum offers an actual time machine back through Colorado's past.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The Habsburgs' royal collections of art and wonders.

Legends surround an ancient tree trunk riddled with nails for good luck.

A spherical "micro-nation" in the heart of Vienna.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.