This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

Entering this curiosity shop is like stepping into a mad scientist's lab.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

The monster at the center of the Darwin Center Spirit Collection.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

With over 12,000 different species of plants, this botanical garden is Japan's oldest and most diverse.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This 16th-century monastery has been turned into a surrealist architecture compound.

A little-visited waterfall in an otherworldly landscape.

This artificial cave looks like something out of a fairytale.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A former utopian healing center created by a huckster and built by derelicts.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.