Months before it opened, the world's largest underwater restaurant in Norway was already flooded with reservations. Recently, Business Insider reported that Under has finally started serving its first guests. If you can't book a table at the hottest restaurant below sea level, you can look at the photos taken inside to get an idea of the unique dining experience.

In addition to being the largest underwater restaurant on Earth, Under, from the architecture firm Snøhetta, is also the first of its kind in Europe. It's located in the notoriously treacherous waters off Norway's southern coast.

Ivar Kvaal

After entering the angled building from the shore, guests descend into a 100-person dining room with panoramic views of the ocean and passing marine life. The concrete structure is designed to blend seamlessly into the surrounding environment, eventually acting as an artificial reef that attracts plants and animals. The location boasts such biodiversity that Under is also being used as a research center for marine biologists.

Ivar Kvaal

Ivar Kvaal

Once seated, diners will be treated to a seasonal meal from an international team of chefs led by Nicolai Ellitsgaard. The menu highlights locally sourced produce and sustainably caught wildlife. A full meal lasts roughly three-and-a-half to four hours.

Stian Broch

Stian Broch

Ivar Kvaal

Inger Marie Grini/Bo Bedre Norge

Seats at Under are fully booked from now to the end of September. If you're content with getting your name on a waiting list, you can try to reserve a table for earlier in the year through the restaurant's website.

[h/t Business Insider]