A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A plaque outside the San Jose airport commemorates the insect's arrival to the West Coast.

Today's aerospace industry can be traced back to one man and his gliders.

A giant chess set, minus the psychedelic drug trip.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

An abandoned lot littered with concrete debris was once the home of the world's first female railroad president.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Seven ceramic sculptures are scattered around this California college campus.

A tribute to one man's legacy of improving the accordion's reputation.

A vaudeville performer mounted this hollowed-out redwood log onto the chassis of a truck, and toured the country spreading a message of conservation.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

An optical illusion found amid a logged redwood forest.

Celebrating the transformation of trash into objects of beauty.

This massive redwood tree has a hole in the base big enough to drive through.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

This "synagogue" is not what it seems to be.

The man who voiced Bugs Bunny, Daffy Duck, Porky Pig, and more has a headstone reading, "That's all, folks!"