The world's largest fully steerable radio telescope.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The largest radio telescope in the world searches for extraterrestrial life from the remote limestone peaks of southern China.

The only Florida state park with publicly accessible caves.

A tribute to the furry local heroes who helped get residents through many tough times.

Ancient church constructed with a special wood that preserves prints from the past.

A humid oasis combines recreation with exploration in a unique underwater cavern.

For a time this small Florida town of less than 1,000 residents was the national leader in dismemberment.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

This beautifully deceptive waterfall is something far different from what it appears to be.

Some 20,000 dust-covered unwanted vehicles languish in the desert.

The longest living non-clonal organisms on Earth.

Budapest's Communist-era statues, banished to the suburbs.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

A museum celebrating rare American motorcycles where everything runs—and none of it quietly.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

The remnants of an early American attempt at missile defense.

A crumbling hospital from the 1850s on Roosevelt Island.

This former luxury resort in Kaua'i is now an abandoned relic.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.