What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Floating swimming pool within a moored vessel.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Art and a pun, all in one.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

A surreal museum of extraordinary industrial objects.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

An alchemist's "magic door" stands in the middle of a Roman park.

Isaac Newton's former home, where the famous apple tree still stands.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

The struggle of a small Dutch island against the sea.

Repurposed space and ultra-modern construction collide to create this geometric wooden spectacle.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This Dutch statue is a monument to the fictional shrew who brought doom to the city of Stavoren.

This stately council chamber hasn't changed since 1545.

Colorful and chaotic stacked hotel in North Holland.