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

Tiki luxury on Nob Hill.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

Saintly bones pressed into a wax effigy of a Catholic superstar.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Paris' linguistic guide to the international language of, yes, love.

France's most famous cemetery, with some of its most curious tombs.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.