The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

This 19th century cyclorama acts like an analogue time machine to a different era.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A very classy 1920s-era bar right in Grand Central Station.

A bar, burger joint, and arcade housed in a late 19th-century church building.

Rochester's signature culinary delicacy.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Medieval torture techniques with a modern conscience.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A centuries-old church stands as a testament to Boston's "father of architecture."

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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

No one messes with the Massachusetts sacred cod, not this time...

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