One man’s hobby is another man’s world of metal wonders.

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

A book bound in the skin of an infamous criminal, along with countless other specimens.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

These fantastically named natural pools look like something out of a Scottish myth.

A winding, blood-red tunnel of hardened lava navigable by foot.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

A former telephone box found new life as a photo booth and charity fundraiser.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The summer tourists on these cliffs are thousands of seabirds.

This beautiful, historic church looks like something out of a simpler past.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

An abandoned town is hidden in Great Smoky Mountains National Park.

This historic folk museum celebrates the attention to detail that makes America great.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

This Little Rock legend has survived decades of rowdy crowds, three fires, and a zombie wedding.

The Ozarks' strangest dwelling.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.