Annual technopop celebration of peace and love.

A memorial to those who donated their bodies to science.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

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

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The beautiful baroque library of the Hapsburg empire.

This abandoned ship has remained in place since it ran aground in 1998.

While most shipwrecks are submerged, this ship in Cyprus ran ashore.

A large collection of solar and night-time telescopes dot a small area on the Teide mountain range.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

An unexpected ghost village lurks on the southeast coast of Tenerife.

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

A pair of gigantic baby heads greet passengers at Atocha Station.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

This postmodern apartment block was designed to be a vertical neighborhood.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

An homage to the first Spanish cyclist to win the Tour de France.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

The ruins of an ancient stadium that hosted gripping chariot and horse races.