The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

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

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

The oldest church in Iceland is one of the few to feature ornate decoration.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Mysterious meeting place for UFO hunters near Area 51.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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

This small chapel is built of human bones and decorated with a golden skeleton.

Ancient catacombs form the foundation for this Rococo orgy of a church.

An honorary saint of the people, Maria Adelaide became an incorrupt corpse, the clothes intact, exhaling “a strong scent of roses.”

One of the largest Roman settlements in Portugal.

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A complex of six forts embedded in the Rajasthan hills.

A church of bones, decorated with 40,000 human skeletons.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Ozymandias’ time-keeping temple.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A small, but award-winning beach known for its literally spotless reputation.