The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

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

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Giant, friendly pelicans in Central London, the most unlikely of places.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Eighty million natural history specimens call this gargantuan museum home.

An astounding collection of taxidermy, fossils, skeletons, and even a few strange live beasts.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Built in 1347, this belfry is one of the oldest in the world and survived intense bombing during World War I.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Site of one of World War I's most horrific scenes.

A modest reminder of treacherous waters at the Golden Gate.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

London's old-school healing garden.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.