Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Handsomely crafted representations of our round planet.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The beautiful baroque library of the Hapsburg empire.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

On the Oregon coast there is a natural hole that seems to be draining the sea.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The stoutest tree in the world.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Frida Kahlo's childhood home, now a museum of her life and works.

The spot where the two men ate together now stands enclosed in glass.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.