This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This crumbling Portuguese ruin overlooks the populace it once ruled.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

The colorful, smiling concrete silos of Vancouver.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

These delicate sand pyramids look like naturally occurring gothic spires.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

Once a black market electronics marketplace, now an otaku shopper's paradise.

This 700-year-old street food market features baby octopus and soy donuts.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This beautiful, historic church looks like something out of a simpler past.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

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

A natural wonder in south Denmark.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.