The world's tallest bridge is also possibly the most elegant.

This dangerous-looking suspension bridge may have been too unstable to remain open.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

South Korea's only sex-themed park.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Ruins of a German Castle on top of a towering stone pillar.

A bus with a butt and biceps to put Olympic athletes to shame.

An ornate century-old elevator still connects the two halves of Bad Schandau.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

This chimerical bridge/tunnel appears to dead end right into the sea.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This fantastical house shaped like a seashell brings aquatic design to architecture.

An Aztec snake god has taken the material form of an apartment complex.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

A more chill but no less fascinating version of the famous ancient archeological site.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Underwater restaurant at the coral reefs of Eilat.

This 17th-century mausoleum is topped with an acoustic marvel.