Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A kaleidoscopic warehouse-maze of handmade neon signs.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A mountaintop space observatory that is certified dark.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

This bridge is haunted by the ghost of a distraught mother.

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

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

Railroad came. People came. Railroad left. Town died.