The key to turning shifting dunes into the green oasis of Golden Gate Park.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Olfactory delights in San Francisco's Botanical Gardens.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

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

Stolen goods adorn the organ at Old North Church.

This impressive Boston holy house is the American mecca for Christian scientists.

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

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

"Mock all and sundry things, but leave the saints alone."

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

The massive machine creates cracking displays of indoor lightning.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Some of the smallest works of art in existence.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

A New Hampshire grave with a grudge.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.