This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

A massive wintry wall of snow up to 66 feet tall flanks a highway through Japan's mountains.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

This fountain was once heralded as the largest in the world.

This Singaporean food-court stall was home to the world's cheapest Michelin-starred meal.

Singapore's landscaping project is home to 18 incredible Supertrees.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The world's largest wooden structure.

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

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

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

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

These temples are among the oldest free-standing stone buildings in the world.

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

Alien rock formations grown from the sands of an Australian national park.

The world's "leaniest" tower encourages you to test the gravity of its situation.

Visible from both land and sea.

This Western Australian mint was established during the height of the Australian gold rush.