A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The remains of this visionary community can still be found much as it was a century ago.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

An enormous goose sits atop this nest-shaped home.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

Prehistoric animals decorate this popular outdoor park.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

This massive library holds what was once the largest book collection in the world.

The oldest stone house in Paris was built by its most famous alchemist.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

An abandoned relic of the city's failed experiment with below ground transit.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

360° views of the city plus five floors of optical illusions and hands-on science.

Final resting place of the two women killed on a small island off the coast of New Hampshire.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

The sign at the garden gate reads: "These Plants Can Kill."

Annual celebration commemorating the 1965 sighting of strange lights in the town.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.