Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

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

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Week-long block party becomes a competition for the best decorated street.

From Japan to Italy, this California park explores the world's cultures through their gardens.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

New fungal and bacterial species call this deadly lake home.

Largest lake in Great Britain measured by surface area.

A tunnel of hardened lava along Maui’s famous Road to Hana.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

An offbeat angle on the ocean viewed through an antiquated lens.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

This black shoreline is made up of exploded lava particles.

An abandoned water sports stadium that has become a haven for graffiti and decay.

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Abandoned silver mine strewn with wrecked and twisted structures.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

The mysterious round rocks of Schooner Gulch.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.