Ride a boat through this magnificent underground world, which now doubles as a theater.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

A forgotten "city of water" underneath the famous Trevi district.

A serene mountaintop temple complex featuring one big, bronze Buddha.

In 806, Kobo Daishi began meditating on Mount Misen. The Buddhist monk lit this holy fire, which has been kept burning for 1,200 years.

This Japanese national treasure was originally built in 593.

Peace Park and the Atomic Bomb Dome.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

A 59-ft. robot statue looks over the citizens of earthquake-ravaged Kobe.

Once a black market electronics marketplace, now an otaku shopper's paradise.

Birthplace of the Tendai sect and home to the marathon monks.

Surreal giant face-pillars welcome visitors from across the globe to this hotel.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A beautiful bamboo trail tucked in this famous Japanese shrine.

An LED art installation composed of 600 poles wrapped in kimono fabric.

The site where the famous city gate once stood, now in the middle of a playground.

The 10,000 Torii shrine.

The quintessential Japanese rock garden has existed for more than 500 years.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

Shrine dedicated to boars that is believed to cure foot and leg injuries.

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