Cooled, fractured lava formed this geometric rock feature.

As telephones become more essential and less stylish one historic Brooklyn building remembers the days when they were a grand celebration of communication.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Commemorating the spot where the famous scientist fed his pigeons.

A veritable variety of odds and ends.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

Located outside Medellín, this Colombian park focuses on conservation and sustainability.

A museum of memories in what was once one of the most violent cities in the world.

The mummified relics of an American missionary.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Set sail on a small scale.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

This city park wants you to take your shoes off.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Wayne Newton's sprawling estate is now open for visitors to catch a glimpse of his "heart and soul."

Formerly frequented by Hollywood stars and now open for tours.

An ode to one of the dirtiest jobs during the construction of the Boulder Dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

At the base of the Spring Mountains, a unique nursery packed with desert plants.

The so-called "Father of Las Vegas" had the city's first telephone installed in his office in 1907.