This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

The oldest continuously operating fish market in the United States.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A layered tribute to the work of mosaicist Isaiah Zagar.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

The "Seinfeld" diner.

The eccentric mansion of one the most popular horror authors of modern times.

This popular pitstop lives up to its name.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An automaton perched above an classic clock and watch store

The remains of this misplaced church were moved here stone by stone.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

An ancient Egyptian temple in the middle of Madrid, Spain.

The remains of a convent turned military barrack in the heart of Madrid.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.