This mysterious abandoned fort looks like something pulled right from Arabian legend.

One of the world’s largest suspended aquariums, located in Dubai Mall.

A small United Arab Emirates territory within an Omani enclave within the United Arab Emirates.

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

The oldest surviving mosque in the UAE has mysterious origins and unusual architecture.

In an Emirati park near the Omani border, a reconstructed Bronze Age tomb with impressive reliefs.

This picturesque beacon was built to keep boats safe shortly after the Civil War.

This nearly 200-foot tall limestone stack offers visitors amazing views and a chance to meet Paul Bunyan and Babe the Blue Ox.

Rusting hulk stands in testament to the Keweenaw Peninsula’s rich history of copper mining.

This was the first ever National Lakeshore, established in 1966.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

The smallest post office in the United States is no bigger than a broom closet.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

The ghostly remains of an accidental sea.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

This Great Plains museum pays tribute to both the prosperity and tragedy of the North American fur trade.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Minnesota's highest point is a scenic vista marked by a plaque and armies of mosquitoes.

Half of a waterfall goes into the river while the other half seems to disappear.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.