Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A remarkable feat of Victorian engineering across the Firth of Forth.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

An entertainment center in a huge transparent tent.

A modern tower, symbolizing the legend of a golden egg on top of the tree of life.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Hans Christian Andersen for the postmodern world.

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A striking symbol of the Bulgarian capital.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

Legend says this sacred tree was a gift from goddess Athena.

Gladiators once walked this ancient, subterranean passage.

The memorial stands at the intersection of the rivers Morava and Danube.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Go surfing on this urban wave, "hacked" by local surfers.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Climb inside an iron crystal magnified 165 billion times its normal size.