A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

What appears to be an ancient Roman temple is actually a Catholic church.

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

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

This mosaic commemorates the oldest subway tunnel and station in the United States.

The Boston square dedicated to the dark poet who was born nearby.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This 18th-century sundial was designed to calculate the date of Easter each year.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

The fifth-longest natural arch in the world, and the longest outside China.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A huge musical instrument played by the ocean.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.