One who is fully conversant with the Kṛṣṇa science becomes eligible to enter into the spiritual kingdom, theabode of Kṛṣṇa.
(Bhagavad-Gita----8:55----purport).

The abode of Kṛṣṇa is always served by hundreds and thousands of goddesses of fortune.
(Srimad Bhagavatam----10:5:18----purport).

Devotees accept only the bare necessities of life to keep themselves fit to act in Kṛṣṇa consciousness. The balance of their energy is used for developing Kṛṣṇa consciousness, through which one can be transferred to the abode of Kṛṣṇa by always thinking of Him, even at the point of death.
(Sri Caitanya Caritamrta----1:3:91----purport).

In the advanced stage, one falls completely in love with Kṛṣṇa. This highest perfectional stage of life enables the devotee to be transferred to Kṛṣṇa's abode in the spiritual sky, Goloka Vṛndāvana, where the devotee becomes eternally happy.
(Bhagavad-Gita----8:28----purport).

On the Vaikuṇṭha planet in every universe is an ocean of milk, and within that ocean is an island called Śvetadvīpa, where Lord Viṣṇu lives. Therefore this chapter describes two Śvetadvīpas-one in the abode of Kṛṣṇa and the other in the ocean of milk in every universe. The Śvetadvīpa in the abode of Kṛṣṇa is identical with Vṛndāvana-dhāma, which is the place where Kṛṣṇa appears Himself to display His loving pastimes. In the Śvetadvīpa within every universe is a Śeṣa form of Godhead who serves Viṣṇu by assuming the form of His umbrella, slippers, couch, pillows, garments, residence, sacred thread, throne and so on.
(Sri Caitanya Caritamrta----1:5--summary).

Śrīmad-Bhāgavatam also describes how yogīs can travel to all the planets in the universe. When the vital force is lifted to the cerebellum, there is every chance that this force will burst out from the eyes, nose, ears, etc., as these are places that are known as the seventh orbit of the vital force. But the yogīs can block these holes by complete suspension of air. The yogī then concentrates the vital force in the middle position, that is, between the eyebrows. At this position, the yogī can think of the planet to which he wants to go after leaving the body. He can then decide whether he wants to go to the abode of Kṛṣṇa in the transcendental Vaikuṇṭhas, from which he will not be required to descend into the material world, or to travel to higher planets in the material universe.
(Sri Caitanya Caritamrta----1:5:22----purport).

Outside of Vaikuṇṭha, the abode of Kṛṣṇa, which is called paravyoma, is the glaring effulgence of Kṛṣṇa's bodily rays. This is called the brahmajyoti.
(Sri Caitanya Caritamrta----1:5:34----purport).

In Brahma-saṁhitā the transcendental land of Vṛndāvana is described as being always spiritual. That spiritual land is populated by goddesses of fortune, who are known as gopīs. These are all beloved of Kṛṣṇa, and Kṛṣṇa is the only lover of all those gopīs. The trees of that land are kalpa-vṛkṣa, wish fulfilling trees, and one can have anything he wants from them. The land is made of touchstone and the water of nectar. In that land all speech is song, and all walking is dancing, and one's constant companion is the flute. Everything is self-luminous, just like the sun in this material world. The human form of life is meant for understanding this transcendental land of Vṛndāvana, and one who is fortunate should cultivate knowledge of Vṛndāvana and its residents. In that supreme abode are surabhi cows that overflood the land with milk. Since not even a moment there is misused, there is no past, present or future. An expansion of this Vṛndāvana, which is the supreme abode of Kṛṣṇa, is also present on this earth, and superior devotees worship it as the supreme abode.
(Teachings of Lord Caitanya).

The word klīm added to the gāyatrī mantra is explained in Brahma-saṁhitā as the transcendental seed of love of Godhead, or the seed of the kāma-gāyatrī. The object is Kṛṣṇa, who is the ever green Cupid, and by utterance of klīm mantra Kṛṣṇa is worshiped. It is also stated in the Gopāla-tāpanī Upaniṣad that when Kṛṣṇa is spoken of as Cupid, one should not think of Him as the Cupid of this material world. As already explained, Vṛndāvana is the spiritual abode of Kṛṣṇa, and the word Cupid is also spiritual and transcendental.
(Teachings of Lord Caitanya).

There are various kinds of personal devotees of Lord Kṛṣṇa in the transcendental abode. For example, there are servants of Kṛṣṇa like Raktaka and Patraka and friends of Kṛṣṇa just like Śrīdāmā and Sudāmā. There are also parents of Kṛṣṇa, just like Nanda and Yaśodā, who are also engaged in the service of Kṛṣṇa according to their respective transcendental emotions. One who desires to enter into the supreme abode of Kṛṣṇa can take shelter of one of such transcendental servitors.
(Teachings of Lord Caitanya).

By following the mood of the associates and friends of Rādhārāṇī, one can ultimately achieve the perfectional stage and be transferred to Goloka Vṛndāvana, the transcendental abode of Kṛṣṇa.
(Teachings of Lord Caitanya).

A sincere devotee will surely be transferred to the abode of Kṛṣṇa, as affirmed in Bhagavad-gītā.
(Nectar of Devotion).

The person who has executed many great sacrifices will attain the result of his pious activities, but when such results are finished, he has to take birth again on the earthly planet; however, the person who has once offered respects, bowing down before the Deity, will not come back to this world, because he will go directly to the abode of Kṛṣṇa.
(Nectar of Devotion).

It is stated in the Viṣṇu-rahasya, "Any person who can arrange for service to the Lord in the same way that a king is given service by his attendants is surely elevated to the abode of Kṛṣṇa after death."
(Nectar of Devotion).

The effulgence pervading the universe is considered to be the rays of the Supreme Personality of Godhead. The supreme abode of Kṛṣṇa is always throwing off the effulgence known as brahmajyoti, and that effulgence is emanating from His body.
(Nectar of Devotion).

In the spiritual kingdom of Lord Kṛṣṇa, named Goloka Vṛndāvana, there are surabhi cows which give unlimited quantities of milk. There are desire trees from which anyone can take all kinds of fruits, as much as he may desire. The land is made of touchstone, which when touched to iron will transform it into gold. In other words, although in the spiritual kingdom, the abode of Kṛṣṇa, everything is wonderfully opulent, still when Kṛṣṇa was in Dvārakā His charity exceeded the opulences of Goloka Vṛndāvana. Wherever Kṛṣṇa is present, the limitless opulence of Goloka Vṛndāvana is automatically present.
(Nectar of Devotion).