This naturally-sourced hot spring is now home to a clothing-optional resort.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Eat like a bird in a bamboo nest.

Seat of the Duke and Duchess of Devonshire for centuries.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

The first archaeological site discovered by aerial photography.

Used as an example in one of the first dictionary entries for "museum" in 1706.

Cliffs full of fossils at the portal to England's Jurassic Coast.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

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

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

An alien landscape on the banks of the Aegean Sea.

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

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

A strange aquarium with stuffed fish, and almost no water for them to swim in.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

The deadliest diving spot in the world is also a stunning geological marvel.

The largest known Ancient Egyptian obelisk.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

This ancient structure is widely thought to be the oldest intact pyramid in the world.