This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

St. Augustine's record-setting narrow street was designed to protect against pirates.

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.

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

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The first Russian Orthodox church in North America and an Alaskan landmark.

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

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

The bears of Bern have been a city highlight for over 500 years.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.