The wooden airship was the largest flying boat ever built.

What once housed a private club catering to Comstock Lode elite is now considered one of the West’s most haunted spaces.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

This fascinating museum takes visitors through Britain’s Roman past.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The world's oldest continuously operating record shop has been in Cardiff since 1894.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The longest and widest floating bridge in the world.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

Old 'Nutcracker' sculptures from 'Where the Wild Things Are' author found new life as a seasonal attraction.

Scattered around Atlanta are little doors with big charm.

The tabby ruin is Savannah’s oldest surviving structure.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

An early-19th-century hotel with a past that is steeped in the Civil War.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.