This inexpensive lodging house was once a prison notorious for its inhumane practices.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Profile of a sleeping person 4km long in 250m high cliffs.

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

This old residential building was once the largest flour mill in the world.

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

Funhouse of found art and participatory sculpture.

A Borgesian work of art that may blur the line between fiction and reality a little too convincingly.

One of two giant blue cockerel statues erected with an intentional double meaning.

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

A stone face watches over the river.

An amazing collection of sculptures and art.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

A silly medieval mural preserved on the side of a Viennese house.

The solemn exterior conceals an opulent interior of this 17th century church.

A magnificent collection of imperial armor and weaponry.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

An early 20th-century jail not far from the infamous Tombstone, Arizona.