The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

The largest shot tower in Australia is a unique reminder of industrial ammunitions history.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

"Holy Wisdom" overlooks the city that became its namesake.

An homage to the medieval rulers of Bulgaria.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Once America's tallest structure, now a Baltimore landmark.

A vast Communist-era exhibition space in the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

Elvis's own personal tropical hideaway.

This elaborate towering structure was once famed for its revolutionary height.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

A charmingly old-fashioned reminder of the historic building's former life.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

A striking 12th-century-style castle built on the edge of a cliff.

When you're a great Russian Tsar, even your vomit gets a statue.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.