This is the last hand-cranked chain ferry of its kind in operation in the United States.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

A gorgeous stone viaduct crosses over a bucolic valley.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

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

This work of engineering is imbued with elegance and ingeniousness.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

An author's private collection of quirky travel-trinkets and oddities has become a rotating mini-museum in the window of a local bookstore.

This three-story antique market and curiosity emporium claims to be "the largest singly owned antique shop in the Pacific Northwest."

One of the largest early 20th-century bridges in Sudan.

This WWII aircraft museum presents its wrecks like taxidermy, complete with recreations of the crash sites.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

Nearly 2 billion seeds from 38,000 species are stored and processed at this visitable facility in a quiet corner of England.

Every Saturday morning, this microbakery fills up with freshly baked pastries and sourdough breads.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

Stone markers on the campus of Gallaudet University commemorate a peculiar school tradition.

After giving up Michelin glamour for his Amish faith, one chef now makes stellar sausages in a small, off-the-grid shop.

Legend says this rock spire is the finger of a witch who wanted to throw the Faroe Islands towards Iceland.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

A whimsical roadside community of little metal people.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

A Zoroastrian funerary tower where excarnation rituals are carried out is threatened by the area's dwindling vulture population.

For more than 70 years, this small shop has been a go-to for Kolkata's fountain pen connoisseurs and collectors.