It's always summer at the beach inside this former airship hangar.

A German apartment building hosting as many trees as human occupants.

These 18th century gardens tell a rocky story of the son of Odysseus.

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

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

A stairway to heaven, or to nowhere at all.

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

An intricate and amazing house built by architect Karl Junker.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

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

A wunderkammer of mysterious objects and stories.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

This classic restaurant features a gorgeous mirror-clad room.

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

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

An eerie, derelict amusement park in Berlin.

The ruins of a 13th-century monastery that long served as a place of refuge from wars and raids.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

The world's newest astronomical clock is also its most accurate.

A unique hotel for the artistic soul.

This region of Slovakia boasts some of the most plentiful opal mines in the world.

Fantastic stories on a miniature railroad.