A moving memorial to the fallen and missing from WWI trenches.

A Museum of Psychiatry in a still-operating mental institution.

Christ's blood preserved in a Belgian town.

The once highest point in China blends symbolic design with a kick of adrenaline.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

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

The bears of Bern have been a city highlight for over 500 years.

Famously misunderstood wonder of the ancient world

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Walk the whole Mississippi River!

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

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

Museum in a swimming pool where the water still flows.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

One of the most ethnically diverse spots on the planet.

Final palace complex of the last of 29 Kokand rulers.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.