What was once a bustling mining installation is now a bustling hub of contemporary art.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

The 20-mile causeway that separates the Netherlands from the sea.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Mysterious craters may have been home to an ancient cult.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

The mile-long pier stretches from a ruined fortress out into the Baltic.

3,000 market stands in five former Zeppelin hangars.

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

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

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

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This church also serves as a lighthouse complete with a beacon.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

The rock carving that became an internet meme.

This wonky bit of historical taxidermy is experiencing a second life online.

This strange portrait of six ladies with chicken bodies commemorates a count's dirty habits.

This risqué sculpture, based on a Hans Christian Andersen fairy tale, caused outrage 35 years after it was erected.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.