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

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

The other side is actually green.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Morocco's Argania trees are infested with nut-hungry goats.

Founded as a refugee camp, now a popular tourist spot.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Rome’s legendary peephole vista is also a former Crusader stronghold.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

A tower devoted to — and modeled after — the Divine Comedy.

A floating cat sanctuary on an Amsterdam canal.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

The last bastion of Roman presence north of the Alps looms over a German town.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.