A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A museum dedicated to exhibiting remarkable outsider art.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

A wonderfully curated used bookstore in an airport.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

One of the smallest bookstores on the planet.

This pebble beach is so beautiful that taking its rocks is against the law.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A unique set of caves that spits waves back out into the ocean.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Hundreds of trees made from glass bottles make up this forest on Route 66.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A fitting attraction for the corn capital of the world.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.