An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

These spooky and unusual stone formations create an underworldly landscape.

Legends surround this jagged rock formation in the New Mexico desert.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A Bibliophile's Dream.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ancient human, animal, and geometric figures drawn in the earth.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

The underground sanctuary of a mysterious ancient cult.

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

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.