A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

Rare recess caves fill this unbelievably beautiful Ohio park.

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

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

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Houses are tucked between, on, and underneath giant boulders.

You can row a boat through this ancient underground reservoir.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

In the quiet village of Fulmodestion, the ruins of a medieval church remain hidden among vines and foliage.

A unique 1980s designed church sits uncomfortably in its traditional Victorian churchyard.

This reconstructed ancient fort was home to one of the few horse training rings in the Roman Empire.

Its walls are adorned with exquisite murals of the natural world, transforming it into an ecologist’s Sistine Chapel.

A hidden sculpture garden tucked within the middle of Brighton.

Abandoned for over 20 years, this art deco seaside swimming pool is a magnificent waste.

A lavish Victorian mansion wound up inheriting a gruesome reputation that would be its demise.