Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A delightfully quirky blend of oddities spread throughout an old 1920s bank.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A museum of carnival attractions where you are invited to ride the rides.

The resting place for anonymous victims of the Danube's dark waters.

A promotional sun clock on the site of San Francisco's great raceway.

Golden Gate Park's historic collection of plants.

The remains of a ruined mansion memorialize the 1906 earthquake.

Olfactory delights in San Francisco's Botanical Gardens.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Treehouse motel and treehouse-building school.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A Tibetan Temple and Buddhist organization just off the beaten path in Northern California.

Celebrating the transformation of trash into objects of beauty.

California's own majestic geyser is powered by a subterranean volcano.

A B&B on a Victorian lighthouse station in San Francisco Bay.