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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

An astounding collection of medical specimens, including bits of President Lincoln.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

An abandoned stretch of highway, deteriorating next to the operational one.

The United States Capitol's former columns still stand.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

A haunting tribute to pioneering photographer Clover Adams.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

The most decorated dog of World War I is preserved in the Smithsonian.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

Guns that have been defending San Francisco since 1904.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Noble beasts perhaps, but not the Emperor's dogs.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

A vast city of the dead, where the deceased outnumber the living by more than a million.

This odd little museum holds exhibits on everything from blacksmith equipment to hair jewelry.

The remains of a 12th-century chapter house in Golden Gate Park.

A creepy steel gremlin has protected the Bay Bridge since 1989.