Two standing giants remain as a tribute to Luxembourg's metallurgical past.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The topiary maze at the Habsburg hunting lodge.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

“The oddest pub in South Africa,” inspired by a practical joke.

Largest cave system in Africa.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

A vast Communist-era exhibition space in the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

An abandoned masterpiece of Soviet Brutalist architecture.

The reconstruction of this prominent building fulfilled a long-written command.

3,000 market stands in five former Zeppelin hangars.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This medieval footbridge in the Swiss Alps is known to attract cliff-jumping daredevils.

If James Bond bungee-jumped off the side of a 720-foot dam, would you do it too?

This winding road through an Italian canyon may be the most scenic drive in the world.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.