This dangerous-looking suspension bridge may have been too unstable to remain open.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Once a private collection, now the only museum of arms and armor in the Western Hemisphere - CLOSED.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

The world's largest piece of copyrighted artwork.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This landmark cemetery in Boston was created more than 300 years ago.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Millions of numbers carved in glass represent the tattoos forced upon victims.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

The world's first ice hotel is still one of the most elaborate and beautiful.

The show's fictional Korean medical camp was created in the Santa Monica hills.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.