Places meltingknight Wants to Go

Every September, international competitors flock to the flooded quarries of a tiny Scottish island.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

One of the world's most definitive collections of musical instruments, spanning all cultures and historical periods.

This simple stone monument honors a 19th-century tragedy.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

The surviving remnants of a destroyed medieval church now stand in a public park.

This modernist church's massive sci-fi dome may be one of Latin America's largest.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The 3.8 billion-year-old rock proves that tectonic plates may have been shifting longer than we thought.

1% of Greenland's entire population used to live in this single building, which is now slated for demolition.

Greenland's first shopping mall also hosts the country's government.

These eight mummies are the best-preserved human remains ever discovered in North America.

Few of the many visitors to this resort town know of its hidden Maya ruins.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This ancient Roman arch misled treasure hunters for centuries.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

These circular ruins are all that remain of a 17th-century Arctic whaling outpost.

The 19th-century vessel floats proudly on Lake Titicaca, but its journey from Britain to the Peruvian altiplano was far from smooth sailing.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.