The record holder for the world’s largest peach.

The oddly shaped, steam-spewing building is now an art studio and gallery.

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

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Berlin's old airport.

Floating swimming pool within a moored vessel.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Living trees form the structure of an open-air palace.

A small but immensely extravagant palace built by the "Night King."

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

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

When the rain falls, this drain system turns into a musical instrument.

This "floating railway" is one of the world's oldest monorail systems.

Art and a pun, all in one.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The cellar of a former factory is now home to a collection of gloves, machines, and tools of the trade.

Where hikers on the Tecumseh Trail can exchange a dirty sock for a free geode.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A giant telephone commemorates the last "crank" call ever made in the U.S.

Tirelessly maintained by a Wisconsin man named JFK.

An enormous roadside pan tells the story of a battle for pie glory.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.