(龍宮窟) Ryugu Sea Cave

Due some geologic events that happened over the course of millions of years (not a hyperbole), this cave was formed and when it did it somewhat split into two curves, which the locals call "heart-shaped".

Overall, it was a quaint little cave, and you can do a nice stroll to peek down into it. If you have a car, it's an easy segue.

Budget: JPY6,270 (~USD59)

JPY2,410, Train, Tokyo Station to Ito Station, One day's worth allocated with Seishun 18 ticket.
JPY1,650. Train, Ito Station to Izukyu-shimoda Station.
JPY280. Bus, Shimoda Station to Ryuuguu-kutsu
JPY280. Bus, Ryuuguu-kutsu to Shimoda Station.
JPY1,650. Train, Izukyu-shimoda Station to Ito Station.

Visit Date
August 2, 2020

When to Go
Anytime during the year, for sure.

Special Notes

Public Transport Access. It is surprisingly accessible, but there's about seven buses in a day, so time your trip well. Google maps actually work well, so just key in this google map pin on your phone.

Train, Tokyo to Shimoda Station (下田駅)

It is JPY3,960 one way, or JPY7,920 for a day's trip.
An alternative is to use the Seishun 18 ticket up to Ito Station, then pay for the non-JR train to Izuku-shimoda Station, for a total of JPY5,710. However, this is only applicable for a day trip.

Bus, Shimoda Station (下田駅) to Ryuuguu-kutsu (龍宮窟).

Boating. I saw some posters where you can take a boat and the boat will pass through the cave too. But it is definitely not near the cave, and I tried a quick research to no avail. :(
Entrance fee: Free
Parking fee: Free, but limited. There are nearby parking lots, but can be upwards of JPY500.
A quick "trek". To see the Heart Shaped perspective - you can do a 15 minute loop around the mouth of the cave. The entry point is right behind the entrance of the cave.