Famously misunderstood wonder of the ancient world

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

The Guardian of Tallinn.

"There's nothing there," and other lies the KGB told us.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

A former imperial sea-fortress and Soviet prison.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

Ever-growing collection of devils in art.

An artist's mausoleum with a haunting echo.

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

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

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.