An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

The subterranean sanctuary home to local shamans is a sacred site for people of all religions.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

Over 60 species of birds inhabit this colorful aviary park in South Africa.

The 28-foot granite map plots the locations of 40 theaters in New York City.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

The most confusing clock in New York.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

Local lore says a serpent-like beast lurks in the deep basin below the falls.

This abandoned Victorian-style house was built in 1884.

The whole world in one water tank.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.