Faces carved into the cliffs create an otherworldly walking trail.

Deep scars on the earth left by the Ice Age.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

The angel of death appears to weep black tears at this grave marker.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

Quite possibly the last cross all humans will ever see.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

More than a millennium's worth of municipal records preserve the political history of Austria.

An IT-specialist-turned-farmer reintroduces an Austrian food tradition while promoting snails as a sustainable "future food" option.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The Habsburgs' royal collections of art and wonders.

Baroque celebration of the end of the Great Plague of Vienna.

The topiary maze at the Habsburg hunting lodge.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The Pope’s secret escape route.

The final resting place of the poets Shelley and Keats.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.