Four hundred granite steps were built into this massive rock by the National Park Service.

This small shack near the entrance to Sequoia National Park has been in almost continuous operation for the last century.

The second-largest giant sequoia in the world.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Discovered in a peat bog, these horned helms come from a thousand years before the Viking Age.

The only surviving piece of Copenhagen's 16th-century defensive wall.

This chimerical bridge/tunnel appears to dead end right into the sea.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The birthplace of the builder of the Statue of Liberty is now a museum dedicated to his work.

A futuristic rocket marks the spot where three borders meet.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

The most impressive of Basel's three remaining city gates.

This artistic fountain display pays homage to this area's theatrical history.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.