Mosaics, storks, and brothels—this ancient city has it all.

Moorish signal station on a stratgic rocky outcrop.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Three columns of volcanic rock shoot out of the ocean.

Rising from the sea like a stone monster.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The celebrated eyesore created by starry-eyed sweethearts.

An abandoned castle owned and ignored by Masons carries a cursed history.

Two stunning 17th-century libraries and a cabinet of curiosities.