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

Flamboyant architecture from the turn of 20th century.

Impossibly life-like natural history models created out of glass by a father and son.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

What happens when you cross a mayor and a painter?

Breathtaking and huge 430 year old maps of Italy.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

3,000 market stands in five former Zeppelin hangars.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

70 years of foreign military influence on the shores of Tripoli, Libya.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

The rusting remains of the largest assembled WWII fleet on the West Coast.

The largest drain hole in the world.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

Largest man-made excavation on earth!

Fortified medieval tower house with lovely roof garden.

Vaucanson's most famous automaton, brought back to life.

These quaint French houses dangle precariously over a precipice.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.