This former steel and coal plant is now a neon-lit industrial fantasia.

The monumental home of Prussia’s eccentric "Cannon King."

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

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

The ancient tomb acts as a calendar that keeps perfect time.

The oldest inn in England served brew to the crusaders.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Natural arch offers panoramic views of Yangshuo's karst hills.

One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

Experience a charming 1930s version of "infotainment."

Single runway interrupted by a busy road that cuts across its middle.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

This colorful gate stands as an entrance to the walled city of Old San Juan.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

Home of the "true" equator.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Try not to get slimed in Tribeca.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Three columns of volcanic rock shoot out of the ocean.

This fairytale-like structure is the last turf church ever constructed in Iceland.